UnPEARs CakePHP.

Let's try this again.

Refs #31.
Refs 4aa4295f03dfedce4d02388453af5c71d13a9b57.

Seems to be working pretty well, although I have only a small app to test with. The only problem I had was a missing CakeLog error. So I added the `App::uses()` in core.php.

It makes sense though. CakeLog used to be loaded in bootstrap.php and that's where the original repo also has the CakeLog config. That was moved to core.php without the `App::uses()` call. I think previously composer accidentally loaded it somehow, but I'm not sure.

@ADmad, what errors did you get and do you still see those errors with these changes?