Added Shipper model and passing test
Added get address function to Shipper model, tests pass
Refactored Shipper model, tests pass
Added Driver model, tests pass. Updated reqs
Added simple implementation of Item model
Updated models to include username as unique identifier for shipper and driver.  Fixed issue with datetime fields
Changed site urls.py so that static media files can be served
Resolve merge conflicts in settings.py and urls.py between frontEnd and backEnd branchesby combining additions. Updated .gitignore to ignore unused pyroute related modules