Added docs for .editor

Added jasny/forms-editor.less to jasny/bootstrap.less

docs/templates/pages/base-css.mustache

@@ -1239,6 +1239,22 @@
   Some text here
   on multiple lines
 </div>
+</pre>
+
+          <h3>{{_i}}Editor textarea{{/i}}</h3>
+          <p>{{_i}}Add <code>.editor</code> to any textarea or <code>.uneditable-textarea</code> to create a larger field for content editing.{{/i}}</p>
+          <p>{{_i}}Also add <code>.editor-html</code>, if the textarea will be replaced by e.g. CKEditor or TinyMCE.{{/i}}</p>
+          <form class="bs-docs-example">
+            <textarea class="editor">
+              Some text here
+              on multiple lines
+            </textarea>
+          </form>
+<pre class="prettyprint linenums">
+&lt;textarea class="editor"&gt;
+  Some text here
+  on multiple lines
+&lt;/textarea&gt;
 </pre>
 
           <h3>{{_i}}Form actions{{/i}}</h3>

docs/templates/pages/index.mustache

@@ -46,6 +46,7 @@
       <div class="span3">
         <h3><a href="./base-css.html#forms">{{_i}}Form elements{{/i}}</a></h3>
         <p>{{_i}}Go beyond uneditable input and create a full uneditable form, with disabled and uneditable elements.{{/i}}</p>
+        <p>{{_i}}Add .editor to a textarea to create a larger field for content editing.{{/i}}</p>
       </div>
     </div><!--/row-->
   </div>

less/jasny/bootstrap.less

@@ -14,3 +14,5 @@
 
 // Base CSS
 @import "forms-uneditable.less";
+@import "forms-editor.less";
+