Add new object type for week based stats

This doesn't require a schema version bump as it can be added transparently
Also fix init conditionals on regular stats
Update weekly stats

* Fix whitespace in message parsing block
* Create stats if no available, this fixes issue #3
* Update copyright
Ignore vim swap files
Increase use of templating

* Be less specific about python version so we can run on mac osx
* Remove use of PrettyTable
* Add table template
* Improve weekstat display