title: Cannot bundle in production
body: <p>I recently had to add two gems to my gem file. When I added them to my gemfile, I pushed directly to my production server.
  I SSH'd into my production server, and tried running <em>bundle install</em>. This is the error I go:</p>
  
  <pre><code>&gt;&gt; bundle install
  </code></pre>
  
  <p>.........</p>
  
  <pre><code>&gt;&gt; You are trying to install in deployment mode after changing
  your Gemfile. Run `bundle install` elsewhere and add the
  updated Gemfile.lock to version control.
  
  If this is a development machine, remove the Gemfile freeze 
  by running `bundle install --no-deployment`.
  
  You have added to the Gemfile:
  * RedCloth
  * tanker
  </code></pre>