Implemented an AutoLoader

Hi David,
I extended the framework with an AutoLoader class. That way no include or required statements to use a class are necessary.
In addition I created a Configuration class, that does now handle the routes and later on the database connection parameters. For the Router and the Configuration one only need a representation of the Sask class. The Router and Configuration are available through Sask.
The AutoLoader has unit tests, we should create them for the other classes, too.
Kind regards,
Stefanie