Merge branch 'master' into v4

Conflicts:
	Gruntfile.js
	_config.yml
	dist/css/bootstrap-theme.css
	dist/css/bootstrap-theme.min.css
	dist/css/bootstrap.css
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	dist/fonts/glyphicons-halflings-regular.eot
	dist/fonts/glyphicons-halflings-regular.svg
	dist/fonts/glyphicons-halflings-regular.ttf
	dist/fonts/glyphicons-halflings-regular.woff
	docs/_data/glyphicons.yml
	docs/_includes/components/alerts.html
	docs/_includes/components/badges.html
	docs/_includes/components/button-dropdowns.html
	docs/_includes/components/button-groups.html
	docs/_includes/components/dropdowns.html
	docs/_includes/components/glyphicons.html
	docs/_includes/components/input-groups.html
	docs/_includes/components/labels.html
	docs/_includes/components/media.html
	docs/_includes/components/navbar.html
	docs/_includes/components/navs.html
	docs/_includes/components/pagination.html
	docs/_includes/components/panels.html
	docs/_includes/components/progress-bars.html
	docs/_includes/css/buttons.html
	docs/_includes/css/forms.html
	docs/_includes/css/grid.html
	docs/_includes/css/helpers.html
	docs/_includes/css/images.html
	docs/_includes/css/less.html
	docs/_includes/css/responsive-utilities.html
	docs/_includes/css/sass.html
	docs/_includes/css/tables.html
	docs/_includes/css/type.html
	docs/_includes/getting-started/accessibility.html
	docs/_includes/getting-started/browser-device-support.html
	docs/_includes/getting-started/community.html
	docs/_includes/getting-started/download.html
	docs/_includes/getting-started/examples.html
	docs/_includes/getting-started/whats-included.html
	docs/_includes/js/affix.html
	docs/_includes/js/alerts.html
	docs/_includes/js/buttons.html
	docs/_includes/js/carousel.html
	docs/_includes/js/collapse.html
	docs/_includes/js/dropdowns.html
	docs/_includes/js/modal.html
	docs/_includes/js/overview.html
	docs/_includes/js/tabs.html
	docs/_includes/nav/components.html
	docs/_includes/nav/css.html
	docs/_includes/nav/javascript.html
	docs/_includes/nav/main.html
	docs/about.html
	docs/assets/css/docs.min.css
	docs/assets/js/customize.min.js
	docs/assets/js/raw-files.min.js
	docs/dist/css/bootstrap-theme.css
	docs/dist/css/bootstrap-theme.min.css
	docs/dist/css/bootstrap.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css
	docs/dist/fonts/glyphicons-halflings-regular.eot
	docs/dist/fonts/glyphicons-halflings-regular.svg
	docs/dist/fonts/glyphicons-halflings-regular.ttf
	docs/dist/fonts/glyphicons-halflings-regular.woff
	docs/examples/carousel/index.html
	docs/examples/navbar-fixed-top/index.html
	docs/examples/navbar-static-top/index.html
	docs/examples/navbar/index.html
	docs/examples/non-responsive/index.html
	docs/examples/non-responsive/non-responsive.css
	docs/examples/sticky-footer-navbar/index.html
	docs/examples/theme/index.html
	fonts/glyphicons-halflings-regular.eot
	fonts/glyphicons-halflings-regular.svg
	fonts/glyphicons-halflings-regular.ttf
	fonts/glyphicons-halflings-regular.woff
	less/_carousel.less
	less/_forms.less
	less/glyphicons.less

docs/javascript/collapse.md

@@ -3,16 +3,42 @@ layout: page
 title: Collapse
 ---
 
-Get base styles and flexible support for collapsible components like accordions and navigation.
+Flexible plugin that utilizes a handful of classes for easy toggle behavior.
 
 <div class="bs-callout bs-callout-danger">
   <h4>Plugin dependency</h4>
   <p>Collapse requires the <a href="#transitions">transitions plugin</a> to be included in your version of Bootstrap.</p>
 </div>
 
-## Example accordion
+## Example
 
-Using the collapse plugin, we built a simple accordion by extending the panel component.
+Click the buttons below to show and hide another element via class changes:
+
+- `.collapse` hides content
+- `.collapsing` is applied during transitions
+- `.collapse.in` shows content
+
+You can use a link with the `href` attribute, or a button with the `data-target` attribute. In both cases, the `data-toggle="collapse"` is required.
+
+{% example html %}
+  <p>
+    <a class="btn btn-primary" data-toggle="collapse" href="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
+      Link with href
+    </a>
+    <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#collapseExample" aria-expanded="false" aria-controls="collapseExample">
+      Button with data-target
+    </button>
+  </p>
+  <div class="collapse" id="collapseExample">
+    <div class="well">
+      Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.
+    </div>
+  </div>
+{% endexample %}
+
+## Accoridion example
+
+Extend the default collapse behavior to create an accordion with the panel component.
 
 {% example html %}
 <div class="panel-group" id="accordion" role="tablist" aria-multiselectable="true">