What file types does GitHub support for README's
<p>I have noticed that many different file types are used for GitHub READMEs. The most common ones are <code>.md</code> and <code>.rst</code></p>

<p>After looking at the GitHub documentation and the help page I found no information on which file types are allowed.</p>

<p>I am just looking for a list of the types so I can figure out which types I can use for my next README.</p>