Added __init__.py
Renamed transport_graphs directory to transportgraphs.
Merge branch 'master' of https://github.com/epileptic-fish/transportgraphs

Conflicts:
	transport_graphs/graphs.py
	transport_graphs/gtfs.py
	transport_graphs/gtfsprovider.py
	transportgraphs/graphs.py
	transportgraphs/graphs/graphs.py
	transportgraphs/gtfs.py
	transportgraphs/gtfs/gtfsprovider.py
	transportgraphs/gtfs/models.py
	transportgraphs/gtfsprovider.py