Many Fixes for V0.3, see changelog for details.
This commit is already huge, but is still missing some more testing.
Removed unused for
Fixed test by returning the expected dict
Added test for modified_files with relative path
Added test for _open_for_write
Added test for _get_cache_filename
Added test for save_output_cache
Added test for get_output_from_cache
Adding more todos.
Removed spurios print
Added TODO: validate the filter format
Added todo: complete test
Updated Copyright years and updated version number