bugfix: cython dependency

Bugfix-Version 1.3.1

Version 1.3.0

documentation extended

neue Version

Version 1.1.1

added #!.. to tests/run_doctests.py and tests/run_unit_tests.py

Version 1.0.2 with faster parse.py-module

New Version 1.0.1

versionnumber bumped to 1.0.0