Fixed bug in datautils.open_anyoutputfile(), and added a test to the test setup.
Moved functions from utils.__init__.py to support_functions.py. Now the __init__.py just imports the functions, so the functionality should not have been changed.
Restructured the pytest plugin, and removed all AnyMocap specific stuff.
Small cleanup in documentation
Don't remove any macro file, if keep_log_files is set to true.