allow for table syntax like on github, plus with tests

if you were interested in GFM style table syntax (example: https://gist.github.com/eleith/76c0bb6f0b05f797d00d)

this pull requests provides support for that (and tests to prove it too)

this is a great project and i'm pairing it with marked.js to provide html <--> markdown conversion. since marked.js supports the table syntax, i wanted to compliment it with support in the markdown to html converter too.

if you are interested, let me know how i can help (this project's code was well written enough that adding support was very straightforward!).

if you want to keep the markdown supported simple, no worries!