+ Added new Configuration Controller Route assertion

Replaced "empty".

parent::_generateBlock can return "false" instead of "null". This causes a fatal error.

! Some changes in configuration constraints
+ Added JSON constraint + assert method in base test case
! Changes in configuration
! Fix issues with mock object creation
! Changes in app/etc/local.phpunit for supporting controller test cases
! Refactored module, almost all the interfaces moved to lib. 
! NOTICE: Constraints are implmented without knowing about Magento system at all, so everyone can use them, just by creating own module that will implement required interface from lib.

! closes feature #55 "Create mock by class alias"