Polishing

It's ~~almost~~ done.

~~It just needs a few tests.~~ What I did ~~do~~:

- Unpluginned it, just a normal PHP package now.
- Added namespaces
- Added PSR-4 autoloading
- Typos and docblocks
- All tests
- Removed PHP < 5.4 leftovers
- Some minor refactoring

I've taken the liberty to add this to a FOC namespace instead of Jippi if that's alright. ~~Anyway, it will be done tomorrow.~~ I'll leave Travis up to you.