extracted filter logic in separate object
added test and fixture for filter
added missing changes for filter test
extracted method mocking in separate class and exposed methods of mock to have a convienent interface for batch operations
extracted method mocking in separate class and exposed methods of mock to have a convienent interface for batch operations
fixed doc type hints and minor code cleanup
fixed array declaration in FilterFixture to be compatible with PHP 5.3
Merge branch 'exposed-mock-methods'

Conflicts:
	src/rtens/mockster/MethodCollection.php