restore "only" wording in docs regarding Recess/less.js

It was there for good reason.
We're not gonna deal with lessphp or dotless bugs.

getting-started.html

@@ -51,7 +51,7 @@ base_url: "../"
 
     <div class="bs-callout bs-callout-warning" id="callout-less-compilation">
       <h4>Compiling Bootstrap's LESS files</h4>
-      <p>If you work with Bootstrap's uncompiled source code, you need to compile the LESS files to produce usable CSS files. We officially support <a href="http://twitter.github.io/recess/">Recess</a>, which is Twitter's CSS hinter based on <a href="http://lesscss.org">less.js</a>.</p>
+      <p>If you work with Bootstrap's uncompiled source code, you need to compile the LESS files to produce usable CSS files. For LESS compilation, we only officially support <a href="http://twitter.github.io/recess/">Recess</a>, which is Twitter's CSS hinter based on <a href="http://lesscss.org">less.js</a>.</p>
     </div>
   </div>