add mention of transitions plugin requirement on collapse

docs/javascript.html

@@ -1112,6 +1112,7 @@ $('#my-alert').bind('closed', function () {
           <h3>About</h3>
           <p>Get base styles and flexible support for collapsible components like accordions and navigation.</p>
           <a href="assets/js/bootstrap-collapse.js" target="_blank" class="btn">Download file</a>
+          <p class="muted"><strong>*</strong> Requires the Transitions plugin to be included.</p>
        </div>
         <div class="span9 columns">
           <h2>Example accordion</h2>

docs/templates/pages/javascript.mustache

@@ -1036,6 +1036,7 @@ $('#my-alert').bind('closed', function () {
           <h3>{{_i}}About{{/i}}</h3>
           <p>{{_i}}Get base styles and flexible support for collapsible components like accordions and navigation.{{/i}}</p>
           <a href="assets/js/bootstrap-collapse.js" target="_blank" class="btn">{{_i}}Download file{{/i}}</a>
+          <p class="muted"><strong>*</strong> {{_i}}Requires the Transitions plugin to be included.{{/i}}</p>
        </div>
         <div class="span9 columns">
           <h2>{{_i}}Example accordion{{/i}}</h2>