title: best way to monitor versioning - ROR
body: <p>I currently have an app that is live.  I want to add a bunch of new functionality to it, but don't want to upload it via heroku until it is completely finished.  The new functionality stuff is quite extensive so it will be done via multiple git branches.</p>
  
  <p>My question is, how do I continue to build out the app while keeping the existing one running and being able to fix minor things here and there on the live site without having the WIP stuff shown?</p>
  
  <p>Thanks.</p>