Start converting to SQLAlchemy
Finish defining tables for sqlalchemy
Make more progress
Split schema definitions into a module
started converting queries to sqlalchemy
Update readme to suggest using requirements.txt
Use lame imports that actually work

Dunno why the absolute import wasn't working. Oh well.
Fix Route/Waypoint relationship; continue stuff

Also, add routemaster.db to the gitignore.
Start writing unit tests
Continue updating queries to sqlalchemy
Remove schema.md (superseded by database.py)
Use Requests for testing; fix imports

Still to-do:
* Write code to initialize a new database.
* Write code to take incoming requests and convert values to the correct types
  for SQLAlchemy (e.g., incoming dates need to be converted from strings).
Add column defaults; clean up code
created tests for adding routes and waypoints
Pass tests! Yay! And auto-init db if necessary

This means I finally wrote the to_json function.
Clean up tests; add requests to requirements.txt
Finish server date parsing; Refactor tests
Update the README
Add friendship functionality
Merge branch 'features/sqlalchemy'