Fixes and changes

[asafdav]

Generally I've made some required changes in order to use this package for google prediction api.
In addition to the change you've started, I refactored some classes to meet PSR-0 requirements.

A summary of the changes I've made:

1. Turned config.php into a class with a namespace, Instead of using global variable, Config behave as a variable storage and provides static method to set and get variables. Changed the entire project to work with the new class, Now it's not necessary to required "config.php"
2. Changed Contrib/*, all of the classes are in a namespace now.
3. Added support for "list" api method in google prediction api
4. Fixed some issues

[evert]

That is a bad-ass diff. Thanks!