title: Using bundler to compile gems hosted on github?
body: <p>So, many people like to fork gems and add features to them etc.. that is fine. but it makes trying their gem a bit of work if you have to clone teh gem yourself, download it, install, etc.</p>
  
  <p>I'd like to be able to have bundler compile the gem for me if there is no pkg/gem_name.gem file</p>
  
  <p>This is what I'm doing currently:</p>
  
  <pre><code>gem "yard-rest-plugin", :git =&gt; "git://github.com/ql/yard-rest-plugin.git"
  </code></pre>
  
  <p>And then the <code>bundle update</code> error:</p>
  
  <pre><code>Could not find gem 'yard-rest-plugin (&gt;= 0) ruby' in git://github.com/ql/yard-rest-plugin.git (at master).
  Source does not contain any versions of 'yard-rest-plugin (&gt;= 0) ruby'
  </code></pre>
  
  <p>Hence why it would be nice if it auto-compiled.</p>