Adds support for flask-peewee
Unit-tests for flask-peewee
Docs for flask-peewee
FIxes peewee description on quickstart
Another small fix for the peewee docs
Method stub parameters and docs for find_role didn't match implementations.
Convenience method for finding or creating a role

`datastore. find_or_create_role("admin")` will now always return a role
with the name admin; useful for initialisation,
Fixes typo in find_or_create_role
Merge pull request #82 from maebert/flask-peewee

Flask-Peewee support