Test suite for actions

DONE:
 - could you let it run in another language? maybe give your script a -l option which you delegate to your phatch process (You can use --options to pass any option to phatch)
 - option to run the actions on one file, not on the whole input folder (Just pass a single file to --input)
 - add a --clean option to remove all generated files also it would be good to put all generated output (including logs) under one folder instead of spread like now
 - test metadata (text file comparison or directly) (Use --compare)
 - Fix false positives in the corrupted counter (Using open_image from phatch library)
 - provide ways to customize time consuming actions e.g. tamogen, blender, ... (Added defaults.py where you can override certain fields)
 - add .txt extension to log files for compatibility with windows
 - every file which is developed by us must share copyright with www.stani.be (to avoid bureaucracy in the debian/ubuntu release process)
- make test suite PEP8 compliant
- fix the newly discovered bugs
- run the test suite by default in english, independent of the localisation of the user, but this still can be overridden by the -l command line option. (so we can share our results easily without learning Dutch, Arabic or Finnish)
- test images should have unicode filenames (eg include accents)