Add TextMate 2 to the list of editors supporting Hasklig

TextMate 2 has now added support for Hasklig, and I'm successfully using it (with my Perl code...)

![screen shot 2014-07-06 at 23 21 30](https://cloud.githubusercontent.com/assets/7347955/3490133/e6a2f580-055b-11e4-9947-a46ef27ff978.png)