Code cleanup
Get rid of /RAID in path
Extending model and calls
War.timestamp becomes war.starttime
Add ability to participate in a war

Call /wars/<warid>participate/ with a POST in which writer nick is given
as writer.
Added ability to withdraw from a war

Call /wars/<warid>withdraw with a POST request which has the nick to
withdraw in writer.
Expanded tests for participate and withdraw
Add war tests
Adding gitignore
Return json rather than neatly formatted text
Cleanup timedelta code
Start reworking nanowars module

First step: test-driven time interpretation
Refactor _convert_to_epoch
Cleanup ugly indentation
Start using /api/ in URLs

This ought to make it easier to distinguish urls which are useful for
API calls from urls which merely render pages.
Minor test improvements
schedulewar with matching tests
Register and deregister score
Code cleanup and change return values to json
Update gitignore