Added distutils setup.py to the python Fieldtrip Buffer.

Hey Jason

Got tired of navigating to the /buffer_bci/dataAq/buffer/python folder each time I wanted to use the python client (which I tended to use for quick tests), so I created a setup.py file that allow you to install the FieldTrip module using distutils. Now I can import FieldTrip anywhere, not just in that one folder.

Figured it may be useful for others, so here's a pull request.

Cheers,

Wieke