incorporate TextMate bundle

Added a submodule for my TextMate [CriticMarkup.tmbundle](https://github.com/DivineDominion/criticmarkup.tmbundle)

Updating should be easy:  before commiting major toolkit changes, simply fetch/update my `.tmbundle` to point at the newest commit and that's it. People can fork/contribute to my bundle separately and it can be added to the TextMate bundle index this way, while everything stays in sync.

Or so I hope, I never tried this before actually ;)