title: Set Vim's shiftwidth and tabstop based on directory
body: <p>I have a project I'm working on currently where the coding standard is to use 2 space indentation. On other projects, however, I use 4 space indentation.</p>
  
  <p>Is there an easy way to tell vim that all files within a certain directory should have a tabstop of 2 spaces?</p>