support markdown syntax

[ronry]

if can support markdown syntax ,it will be great

[aioue]

Duplicate of #38 ?

[yangxiang92]

I also found that this theme doesn't support markdown syntax (not markdown preview syntax, though it doesn't support either). However, I really like the molokai theme, and I don't want to use the Atom default theme. Really hope you guys can add the markdown syntax support.