Update readme
Added Weee module
Added more return types due to the Weee module
Added Weee module
Added GitMessage for mocking
Removed argument from observer method so that you can run it also in a shell script
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  Removed argument from observer method so that you can run it also in a shell script
  Added GitMessage for mocking
  Added Weee module
  Added more return types due to the Weee module
  Added Weee module
  Update readme