.gitignore added
Eth.py: values-properties bindings, refined code

IP.py: values-properties bindings, refined code
Eth.py(test): property tests

IP.py(test): property tests
IP.py: fixed bugs, shortened code
IP.py: removed commented code
Udp.py: Udp structure
Udp.py(test)
Generic: simple decorator to collect test cases
Merging, python branch