[WIP] Add Support for Jasmine in our ArangoDB JavaScript Tests

I can't stand jsUnity any longer. It is not developed for over 3 years and it misses a lot of features. Also: Our reporter is really bad for getting fast feedback.

So I want to fix it. I evaluated two frameworks:

* Jasmine
* Mocha

Mocha seems to be nice, but it is hard to embed. Jasmine has all the features I need, and the implementation was a little tricky but possible :wink:

So let's try this!

(This is still work in progress, don't merge yet)