Adds ClassMapList

A ClassMapList contains the namespaced class-name as key and the files
location as value
Merge pull request #6 from heiglandreas/feature/addClassMapList

Adds ClassMapList
Adds a ClassIsInstanceOf-Filter

This filter checks, whether the class that is defined in the given file
is an instance of one of the given classes or interfaces
Merge pull request #5 from heiglandreas/feature/addClassIsInstanceofFilter

Adds a ClassIsInstanceOf-Filter
Adds integration test

This is simply to check the complete workflow works as expected.