[PATCH]: General cleanups, remove unused files, remove coffeescript

This patch cleans up unused files like lib/bindings/*, removes the dependence on coffeescript and leaves in place a static gitteh.js binding wrapper and updated the README with changes respective of those updates. Some minor changes were made to gitteh.js to improve readability and add a brief doc header, further expansion of comments in that file would be a good next step along with inline examples. I have nothing against coffeescript in general but I think the obfuscation it presents in its use here vastly outweighs the benefits it provides.

I did not cleanup the examples/ folder however most of those don't seem to work. I'm not sure in which cases they ever did, are subject to bitrot, or maybe I am doing something wrong. Someone more knowledgeable about their history should remove anything that is bitrotted, at least for the time being. No examples are better than not working examples in my opinion.