unfortunately Collapse and therefore also jquery are required :/

_includes/head.html

@@ -9,8 +9,8 @@
     <!-- bootstrap -->
     <link rel="stylesheet" href="/bootstrap/css/bootstrap.min.css">
     <link rel="stylesheet" href="/bootstrap/css/bootstrap-theme.min.css">
-    <!--script src="/bootstrap/js/jquery-2.1.4.min.js"></script>
-    <script src="/bootstrap/js/bootstrap.min.js"></script -->
+    <script src="/bootstrap/js/jquery-2.1.4.min.js"></script>
+    <script src="/bootstrap/js/bootstrap.min.js"></script>
 
     <link rel="stylesheet" href="{{ "/css/main.css" | prepend: site.baseurl }}">
     <link rel="canonical" href="{{ page.url | replace:'index.html','' | prepend: site.baseurl | prepend: site.url }}">

bootstrap/config.json

@@ -387,8 +387,11 @@
     "forms.less",
     "responsive-utilities.less",
     "navs.less",
-    "navbar.less"
+    "navbar.less",
+    "component-animations.less"
   ],
-  "js": [],
-  "customizerUrl": "http://getbootstrap.com/customize/?id=f8d5fd8296f89ec97a16"
+  "js": [
+    "collapse.js"
+  ],
+  "customizerUrl": "http://getbootstrap.com/customize/?id=3c7c656f52fd3ed09ab6"
 }

bootstrap/css/bootstrap-theme.css

@@ -5,8 +5,8 @@
  */
 
 /*!
- * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=f8d5fd8296f89ec97a16)
- * Config saved to config.json and https://gist.github.com/f8d5fd8296f89ec97a16
+ * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=3c7c656f52fd3ed09ab6)
+ * Config saved to config.json and https://gist.github.com/3c7c656f52fd3ed09ab6
  */
 /*!
  * Bootstrap v3.3.6 (http://getbootstrap.com)

bootstrap/css/bootstrap-theme.min.css

@@ -5,8 +5,8 @@
  */
 
 /*!
- * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=f8d5fd8296f89ec97a16)
- * Config saved to config.json and https://gist.github.com/f8d5fd8296f89ec97a16
+ * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=3c7c656f52fd3ed09ab6)
+ * Config saved to config.json and https://gist.github.com/3c7c656f52fd3ed09ab6
  *//*!
  * Bootstrap v3.3.6 (http://getbootstrap.com)
  * Copyright 2011-2015 Twitter, Inc.

bootstrap/css/bootstrap.css

@@ -5,8 +5,8 @@
  */
 
 /*!
- * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=f8d5fd8296f89ec97a16)
- * Config saved to config.json and https://gist.github.com/f8d5fd8296f89ec97a16
+ * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=3c7c656f52fd3ed09ab6)
+ * Config saved to config.json and https://gist.github.com/3c7c656f52fd3ed09ab6
  */
 /*!
  * Bootstrap v3.3.6 (http://getbootstrap.com)
@@ -1835,6 +1835,41 @@ select[multiple].input-lg {
     font-size: 12px;
   }
 }
+.fade {
+  opacity: 0;
+  -webkit-transition: opacity 0.15s linear;
+  -o-transition: opacity 0.15s linear;
+  transition: opacity 0.15s linear;
+}
+.fade.in {
+  opacity: 1;
+}
+.collapse {
+  display: none;
+}
+.collapse.in {
+  display: block;
+}
+tr.collapse.in {
+  display: table-row;
+}
+tbody.collapse.in {
+  display: table-row-group;
+}
+.collapsing {
+  position: relative;
+  height: 0;
+  overflow: hidden;
+  -webkit-transition-property: height, visibility;
+  -o-transition-property: height, visibility;
+     transition-property: height, visibility;
+  -webkit-transition-duration: 0.35s;
+  -o-transition-duration: 0.35s;
+     transition-duration: 0.35s;
+  -webkit-transition-timing-function: ease;
+  -o-transition-timing-function: ease;
+     transition-timing-function: ease;
+}
 .nav {
   margin-bottom: 0;
   padding-left: 0;

bootstrap/js/bootstrap.js

@@ -0,0 +1,232 @@
+/*!
+ * Bootstrap v3.3.5 (http://getbootstrap.com)
+ * Copyright 2011-2016 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
+
+/*!
+ * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=3c7c656f52fd3ed09ab6)
+ * Config saved to config.json and https://gist.github.com/3c7c656f52fd3ed09ab6
+ */
+if (typeof jQuery === 'undefined') {
+  throw new Error('Bootstrap\'s JavaScript requires jQuery')
+}
++function ($) {
+  'use strict';
+  var version = $.fn.jquery.split(' ')[0].split('.')
+  if ((version[0] < 2 && version[1] < 9) || (version[0] == 1 && version[1] == 9 && version[2] < 1) || (version[0] > 2)) {
+    throw new Error('Bootstrap\'s JavaScript requires jQuery version 1.9.1 or higher, but lower than version 3')
+  }
+}(jQuery);
+
+/* ========================================================================
+ * Bootstrap: collapse.js v3.3.6
+ * http://getbootstrap.com/javascript/#collapse
+ * ========================================================================
+ * Copyright 2011-2015 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ * ======================================================================== */
+
+
++function ($) {
+  'use strict';
+
+  // COLLAPSE PUBLIC CLASS DEFINITION
+  // ================================
+
+  var Collapse = function (element, options) {
+    this.$element      = $(element)
+    this.options       = $.extend({}, Collapse.DEFAULTS, options)
+    this.$trigger      = $('[data-toggle="collapse"][href="#' + element.id + '"],' +
+                           '[data-toggle="collapse"][data-target="#' + element.id + '"]')
+    this.transitioning = null
+
+    if (this.options.parent) {
+      this.$parent = this.getParent()
+    } else {
+      this.addAriaAndCollapsedClass(this.$element, this.$trigger)
+    }
+
+    if (this.options.toggle) this.toggle()
+  }
+
+  Collapse.VERSION  = '3.3.6'
+
+  Collapse.TRANSITION_DURATION = 350
+
+  Collapse.DEFAULTS = {
+    toggle: true
+  }
+
+  Collapse.prototype.dimension = function () {
+    var hasWidth = this.$element.hasClass('width')
+    return hasWidth ? 'width' : 'height'
+  }
+
+  Collapse.prototype.show = function () {
+    if (this.transitioning || this.$element.hasClass('in')) return
+
+    var activesData
+    var actives = this.$parent && this.$parent.children('.panel').children('.in, .collapsing')
+
+    if (actives && actives.length) {
+      activesData = actives.data('bs.collapse')
+      if (activesData && activesData.transitioning) return
+    }
+
+    var startEvent = $.Event('show.bs.collapse')
+    this.$element.trigger(startEvent)
+    if (startEvent.isDefaultPrevented()) return
+
+    if (actives && actives.length) {
+      Plugin.call(actives, 'hide')
+      activesData || actives.data('bs.collapse', null)
+    }
+
+    var dimension = this.dimension()
+
+    this.$element
+      .removeClass('collapse')
+      .addClass('collapsing')[dimension](0)
+      .attr('aria-expanded', true)
+
+    this.$trigger
+      .removeClass('collapsed')
+      .attr('aria-expanded', true)
+
+    this.transitioning = 1
+
+    var complete = function () {
+      this.$element
+        .removeClass('collapsing')
+        .addClass('collapse in')[dimension]('')
+      this.transitioning = 0
+      this.$element
+        .trigger('shown.bs.collapse')
+    }
+
+    if (!$.support.transition) return complete.call(this)
+
+    var scrollSize = $.camelCase(['scroll', dimension].join('-'))
+
+    this.$element
+      .one('bsTransitionEnd', $.proxy(complete, this))
+      .emulateTransitionEnd(Collapse.TRANSITION_DURATION)[dimension](this.$element[0][scrollSize])
+  }
+
+  Collapse.prototype.hide = function () {
+    if (this.transitioning || !this.$element.hasClass('in')) return
+
+    var startEvent = $.Event('hide.bs.collapse')
+    this.$element.trigger(startEvent)
+    if (startEvent.isDefaultPrevented()) return
+
+    var dimension = this.dimension()
+
+    this.$element[dimension](this.$element[dimension]())[0].offsetHeight
+
+    this.$element
+      .addClass('collapsing')
+      .removeClass('collapse in')
+      .attr('aria-expanded', false)
+
+    this.$trigger
+      .addClass('collapsed')
+      .attr('aria-expanded', false)
+
+    this.transitioning = 1
+
+    var complete = function () {
+      this.transitioning = 0
+      this.$element
+        .removeClass('collapsing')
+        .addClass('collapse')
+        .trigger('hidden.bs.collapse')
+    }
+
+    if (!$.support.transition) return complete.call(this)
+
+    this.$element
+      [dimension](0)
+      .one('bsTransitionEnd', $.proxy(complete, this))
+      .emulateTransitionEnd(Collapse.TRANSITION_DURATION)
+  }
+
+  Collapse.prototype.toggle = function () {
+    this[this.$element.hasClass('in') ? 'hide' : 'show']()
+  }
+
+  Collapse.prototype.getParent = function () {
+    return $(this.options.parent)
+      .find('[data-toggle="collapse"][data-parent="' + this.options.parent + '"]')
+      .each($.proxy(function (i, element) {
+        var $element = $(element)
+        this.addAriaAndCollapsedClass(getTargetFromTrigger($element), $element)
+      }, this))
+      .end()
+  }
+
+  Collapse.prototype.addAriaAndCollapsedClass = function ($element, $trigger) {
+    var isOpen = $element.hasClass('in')
+
+    $element.attr('aria-expanded', isOpen)
+    $trigger
+      .toggleClass('collapsed', !isOpen)
+      .attr('aria-expanded', isOpen)
+  }
+
+  function getTargetFromTrigger($trigger) {
+    var href
+    var target = $trigger.attr('data-target')
+      || (href = $trigger.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '') // strip for ie7
+
+    return $(target)
+  }
+
+
+  // COLLAPSE PLUGIN DEFINITION
+  // ==========================
+
+  function Plugin(option) {
+    return this.each(function () {
+      var $this   = $(this)
+      var data    = $this.data('bs.collapse')
+      var options = $.extend({}, Collapse.DEFAULTS, $this.data(), typeof option == 'object' && option)
+
+      if (!data && options.toggle && /show|hide/.test(option)) options.toggle = false
+      if (!data) $this.data('bs.collapse', (data = new Collapse(this, options)))
+      if (typeof option == 'string') data[option]()
+    })
+  }
+
+  var old = $.fn.collapse
+
+  $.fn.collapse             = Plugin
+  $.fn.collapse.Constructor = Collapse
+
+
+  // COLLAPSE NO CONFLICT
+  // ====================
+
+  $.fn.collapse.noConflict = function () {
+    $.fn.collapse = old
+    return this
+  }
+
+
+  // COLLAPSE DATA-API
+  // =================
+
+  $(document).on('click.bs.collapse.data-api', '[data-toggle="collapse"]', function (e) {
+    var $this   = $(this)
+
+    if (!$this.attr('data-target')) e.preventDefault()
+
+    var $target = getTargetFromTrigger($this)
+    var data    = $target.data('bs.collapse')
+    var option  = data ? 'toggle' : $this.data()
+
+    Plugin.call($target, option)
+  })
+
+}(jQuery);

bootstrap/js/bootstrap.min.js

@@ -0,0 +1,11 @@
+/*!
+ * Bootstrap v3.3.5 (http://getbootstrap.com)
+ * Copyright 2011-2016 Twitter, Inc.
+ * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
+ */
+
+/*!
+ * Generated using the Bootstrap Customizer (http://getbootstrap.com/customize/?id=3c7c656f52fd3ed09ab6)
+ * Config saved to config.json and https://gist.github.com/3c7c656f52fd3ed09ab6
+ */
+if("undefined"==typeof jQuery)throw new Error("Bootstrap's JavaScript requires jQuery");+function(t){"use strict";var e=t.fn.jquery.split(" ")[0].split(".");if(e[0]<2&&e[1]<9||1==e[0]&&9==e[1]&&e[2]<1||e[0]>2)throw new Error("Bootstrap's JavaScript requires jQuery version 1.9.1 or higher, but lower than version 3")}(jQuery),+function(t){"use strict";function e(e){var i,n=e.attr("data-target")||(i=e.attr("href"))&&i.replace(/.*(?=#[^\s]+$)/,"");return t(n)}function i(e){return this.each(function(){var i=t(this),s=i.data("bs.collapse"),a=t.extend({},n.DEFAULTS,i.data(),"object"==typeof e&&e);!s&&a.toggle&&/show|hide/.test(e)&&(a.toggle=!1),s||i.data("bs.collapse",s=new n(this,a)),"string"==typeof e&&s[e]()})}var n=function(e,i){this.$element=t(e),this.options=t.extend({},n.DEFAULTS,i),this.$trigger=t('[data-toggle="collapse"][href="#'+e.id+'"],[data-toggle="collapse"][data-target="#'+e.id+'"]'),this.transitioning=null,this.options.parent?this.$parent=this.getParent():this.addAriaAndCollapsedClass(this.$element,this.$trigger),this.options.toggle&&this.toggle()};n.VERSION="3.3.6",n.TRANSITION_DURATION=350,n.DEFAULTS={toggle:!0},n.prototype.dimension=function(){var t=this.$element.hasClass("width");return t?"width":"height"},n.prototype.show=function(){if(!this.transitioning&&!this.$element.hasClass("in")){var e,s=this.$parent&&this.$parent.children(".panel").children(".in, .collapsing");if(!(s&&s.length&&(e=s.data("bs.collapse"),e&&e.transitioning))){var a=t.Event("show.bs.collapse");if(this.$element.trigger(a),!a.isDefaultPrevented()){s&&s.length&&(i.call(s,"hide"),e||s.data("bs.collapse",null));var o=this.dimension();this.$element.removeClass("collapse").addClass("collapsing")[o](0).attr("aria-expanded",!0),this.$trigger.removeClass("collapsed").attr("aria-expanded",!0),this.transitioning=1;var r=function(){this.$element.removeClass("collapsing").addClass("collapse in")[o](""),this.transitioning=0,this.$element.trigger("shown.bs.collapse")};if(!t.support.transition)return r.call(this);var l=t.camelCase(["scroll",o].join("-"));this.$element.one("bsTransitionEnd",t.proxy(r,this)).emulateTransitionEnd(n.TRANSITION_DURATION)[o](this.$element[0][l])}}}},n.prototype.hide=function(){if(!this.transitioning&&this.$element.hasClass("in")){var e=t.Event("hide.bs.collapse");if(this.$element.trigger(e),!e.isDefaultPrevented()){var i=this.dimension();this.$element[i](this.$element[i]())[0].offsetHeight,this.$element.addClass("collapsing").removeClass("collapse in").attr("aria-expanded",!1),this.$trigger.addClass("collapsed").attr("aria-expanded",!1),this.transitioning=1;var s=function(){this.transitioning=0,this.$element.removeClass("collapsing").addClass("collapse").trigger("hidden.bs.collapse")};return t.support.transition?void this.$element[i](0).one("bsTransitionEnd",t.proxy(s,this)).emulateTransitionEnd(n.TRANSITION_DURATION):s.call(this)}}},n.prototype.toggle=function(){this[this.$element.hasClass("in")?"hide":"show"]()},n.prototype.getParent=function(){return t(this.options.parent).find('[data-toggle="collapse"][data-parent="'+this.options.parent+'"]').each(t.proxy(function(i,n){var s=t(n);this.addAriaAndCollapsedClass(e(s),s)},this)).end()},n.prototype.addAriaAndCollapsedClass=function(t,e){var i=t.hasClass("in");t.attr("aria-expanded",i),e.toggleClass("collapsed",!i).attr("aria-expanded",i)};var s=t.fn.collapse;t.fn.collapse=i,t.fn.collapse.Constructor=n,t.fn.collapse.noConflict=function(){return t.fn.collapse=s,this},t(document).on("click.bs.collapse.data-api",'[data-toggle="collapse"]',function(n){var s=t(this);s.attr("data-target")||n.preventDefault();var a=e(s),o=a.data("bs.collapse"),r=o?"toggle":s.data();i.call(a,r)})}(jQuery);