Merge branch 'dropdown-aria' of git://github.com/mckramer/bootstrap into mckramer-dropdown-aria

Conflicts:
	docs/_includes/js/dropdowns.html

js/dropdown.js

@@ -42,7 +42,9 @@
 
       if (e.isDefaultPrevented()) return
 
-      $this.trigger('focus')
+      $this
+        .trigger('focus')
+        .attr('aria-expanded', 'true')
 
       $parent
         .toggleClass('open')
@@ -88,11 +90,17 @@
     if (e && e.which === 3) return
     $(backdrop).remove()
     $(toggle).each(function () {
-      var $parent = getParent($(this))
+      var $this         = $(this)
+      var $parent       = getParent($this)
       var relatedTarget = { relatedTarget: this }
+
       if (!$parent.hasClass('open')) return
+
       $parent.trigger(e = $.Event('hide.bs.dropdown', relatedTarget))
+
       if (e.isDefaultPrevented()) return
+
+      $this.attr('aria-expanded', 'false')
       $parent.removeClass('open').trigger('hidden.bs.dropdown', relatedTarget)
     })
   }