Added extra splitter expressions and tests for German

As I mentioned in #22, please tell me if this is how you do locale stuff.

And I'm very sorry, but I couldn't manage to run the tests because of PyML compiling problems. If you tell me how I can manage this on MacOS, I'll get this running. And I guess the test `test_pattern_from_block_german` should still fail at the moment.

Just tell me what to do, I'm happy to help!