Update version to be somewhat reflective of actual release history...
Adds back user stats..
A little cleanup to payout tests.

* PEP8, some docstrings, remove dead imports
Fixes paying out unexchangeable currencies and adds tests
Fixes several typos in toml configs.
Removes commited sqlite db
Updates .gitignore to ignore .sqlite files
Closes #116
Closes #111
Adds a management script

* removes CreditExchanges when a currency goes from exchangable to unexchangeable
WIP. Scheduler task almost finished