title: Working with README.md on github.com
body: <p>I am not too familiar with the lightweight markup language used by github when updating README files.</p>
  
  <p>Where are the resources which I can read up on how to write the appropriate markup syntax for my open source library's README/wiki files?</p>
  
  <p>And is there a tool which I can "review my docs locally in my browser" before pushing the updated README to my github repository?</p>