AFK monitoring service

Basic functionality is present.

Some things will probably need improving, namely the regex. Related to [tenyks issue #42](https://github.com/kyleterry/tenyks/issues/42) since I would like the `list` and `query` behaviors to be directed towards tenyks, while `depart` and `return` would be globally available.

Service currently stores the SQLite DB in the same directory as `afk.db`. I have been modeling `tenkysleetpoints` for SQLite behavior, but I wasn't able to get the `settings.WORKING_DIR` to work, as it seems to be a part of `tenyks.client.confg`. Does `tenyksservice` have a similar path that I should use for storing the DB?