add classes
Create README.md
test
test
Changes made to improve the loading of shapefiles and to start importing from the database, though this is not finished yet.
add speed
added speed

Merge https://github.com/nharris172/ncl_visualise

Conflicts:
	example.py
	ncl_network_sim/__init__.py
	ncl_network_sim/classes.py
	ncl_visualize/__init__.py