Add support for new Haml Syntax

Add support for new haml syntax #13 

Can someone please test this hasn't effected anything.

Ruby:
![screen shot 2014-08-27 at 20 25 38](https://cloud.githubusercontent.com/assets/1273965/4066054/83c0aeb0-2e20-11e4-9fc5-80956d5e19a2.png)

Coffee:
![screen shot 2014-08-27 at 20 25 46](https://cloud.githubusercontent.com/assets/1273965/4066056/8c07f15a-2e20-11e4-9482-bcfbd986931d.png)