V0.5.0

Reorganized internal structure:

• mox.get cache is cleaned after every test.
• When mocking a service, the original service is not replaced with a spy object (or spy in case of a filter), but we spy on its methods. Memory footprint is increased a bit, but you now can call .andCallThrough on the methods (#9).
• .andRespond is implemented for Jasmine 2.
• Transcluded content is not mocked by default when mockDirectives is used (#7).