Splitting out the README into separate README and TODO files.
Tidying imports.
Adding a test for `__in` queries.  They don't quite work as they should do, so adding a note to the TODO list about that.
Code formatting niceness.
Adding the beginnings of support for OR queries.  Currently just thoughts.
Adding another test for OR queries.
Adding the default value for `GENERATE_SPECIAL_INDEXES_DURING_TESTING` to settings_base.py, so that it's not a magic setting which is referenced but not defined.
Re-write of the README.

Now focussed on people using it rather than us building it.
Missing a few links to the App Engine docs as I'm on a plane and don't have internets.
Adding a note to TODO.md about making `on_production()` nicer.
Adding links to Google documentation.
Merge branch 'master' into adam_tweaky_time

Conflicts:
	README.md
Adding link to app.yaml docs.
Merge pull request #17 from lukebpotato/adam_tweaky_time

README overhaul and sewing the seeds for OR queries.