Merge branch 'master' into derp

Conflicts:
	Gruntfile.js
	dist/css/bootstrap-theme.css
	dist/css/bootstrap-theme.css.map
	dist/css/bootstrap-theme.min.css
	dist/css/bootstrap.css
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/_includes/components/dropdowns.html
	docs/_includes/components/media.html
	docs/_includes/components/navs.html
	docs/_includes/components/progress-bars.html
	docs/_includes/components/responsive-embed.html
	docs/_includes/css/buttons.html
	docs/_includes/css/forms.html
	docs/_includes/css/less.html
	docs/_includes/css/overview.html
	docs/_includes/css/responsive-utilities.html
	docs/_includes/customizer-variables.html
	docs/_includes/getting-started/browser-device-support.html
	docs/_includes/getting-started/grunt.html
	docs/_includes/getting-started/template.html
	docs/_includes/header.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/popovers.html
	docs/_includes/js/scrollspy.html
	docs/_includes/js/tabs.html
	docs/_includes/js/tooltips.html
	docs/_includes/nav/components.html
	docs/_includes/nav/getting-started.html
	docs/_layouts/default.html
	docs/about.html
	docs/assets/css/docs.min.css
	docs/assets/css/src/docs.css
	docs/assets/js/customize.min.js
	docs/assets/js/docs.min.js
	docs/assets/js/raw-files.min.js
	docs/browser-bugs.html
	docs/components.html
	docs/components/navbar.md
	docs/css.html
	docs/dist/css/bootstrap-theme.css
	docs/dist/css/bootstrap-theme.css.map
	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/examples/blog/index.html
	docs/examples/carousel/index.html
	docs/examples/cover/index.html
	docs/examples/dashboard/index.html
	docs/examples/grid/index.html
	docs/examples/jumbotron-narrow/index.html
	docs/examples/jumbotron/index.html
	docs/examples/justified-nav/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/offcanvas/index.html
	docs/examples/signin/index.html
	docs/examples/starter-template/index.html
	docs/examples/sticky-footer-navbar/index.html
	docs/examples/sticky-footer/index.html
	docs/examples/theme/index.html
	docs/examples/tooltip-viewport/index.html
	docs/getting-started.html
	docs/javascript.html
	docs/migration.html
	less/_animation.less
	less/_modal.less
	less/_navbar.less
	less/_variables.less
	less/glyphicons.less
	less/navs.less
	less/panels.less
	less/progress-bars.less

docs/javascript/buttons.md

@@ -8,7 +8,7 @@ Do more with buttons. Control button states or create groups of buttons for more
 
 <div class="bs-callout bs-callout-danger">
   <h4>Cross-browser compatibility</h4>
-  <p><a href="https://github.com/twbs/bootstrap/issues/793">Firefox persists form control states (disabledness and checkedness) across page loads</a>. A workaround for this is to use <code>autocomplete="off"</code>.</p>
+  <p><a href="https://github.com/twbs/bootstrap/issues/793">Firefox persists form control states (disabledness and checkedness) across page loads</a>. A workaround for this is to use <code>autocomplete="off"</code>. See <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=654072">Mozilla bug #654072</a>.</p>
 </div>
 
 ## Stateful
@@ -38,11 +38,16 @@ Add `data-loading-text="Loading..."` to use a loading state on a button.
 Add `data-toggle="button"` to activate toggling on a single button.
 
 {% example html %}
-<button type="button" class="btn btn-primary" data-toggle="button" autocomplete="off">
+<button type="button" class="btn btn-primary" data-toggle="button" aria-pressed="false" autocomplete="off">
   Single toggle
 </button>
 {% endexample %}
 
+<div class="bs-callout bs-callout-warning">
+  <h4>Pre-toggled buttons need <code>.active</code> and <code>aria-pressed="true"</code></h4>
+  <p>For pre-toggled buttons, you must add the <code>.active</code> class and the <code>aria-pressed="true"</code> attribute to the <code>button</code> yourself.</p>
+</div>
+
 ## Checkbox and radio
 
 Add `data-toggle="buttons"` to a `.btn-group` containing checkbox or radio inputs to enable toggling in their respective styles.