add minimal setup.py module folder
add minimal readme
Improve setup.py
Add classes for general and baseline packets
Added implementation for the controller, dcc loco and a dummy encoder to make some
quick tests. baseline package is renamed to baseline_packet_factory as it is what it does.

Quick testing shows the packets are generated and sent correctly with the dummy encoder.

For a real Raspberry PI implementation we will need to outsource it to C code since
python is unable to deal with microseconds. Don't know if that's going to work at all....
Add an example to the README
Fix setup.py and __init__.py files
Some fixes to DCCLocomotive. Fix example too