2.0.0 fully compiled and running

With changes added to this pull request current version of Phalcon 2.0 can be fully compiled and loaded.

I regenerated some file but fix was inside ext/phalcon/mvc/collection/manager.c file.

After this change and second pull on zephir accepted Phalcon can be compiled again - maybe it would be worth to start run Travis CI on it?

Thanks,

Kamil