Added api endpoints for genre (Fixes #84)
Updated the genre endpoint, and minor changes from review
Modified db-prefill to use `fork()` to start up an instance of the API and persona-faker servers, then kill them on completion; this means that we can now run db-prefill without any prior setup (after `npm install`).

This makes use of redis pub/sub to detect when the API and persona-faker servers are set up, so it requires each to send a message after launching their HTTP server so that db-prefill can begin the pre-fill process. If you have already run `npm install` with persona-faker, you will need to run `npm install` again to receive this change on persona-faker.
Prefix stdout / stderr of child processes with their respective names in db-prefill
Cleanup
Setup exit handler before calling startServers so that if we crash for some reason after creating one server but before finishing the other, we can still kill the server that we had already started
Moved startServers to its chronological location, and refactored the server ready listening into a promise with a timeout handler for easier debugging
Refactored game.js to support filtering a list of games by its properties
Added 'game/list' endpoint to fetch a list of games using filters, including limiting by count. Supports restricted filters that require additonal permissions to use (ie. filtering by 'status' requires reviewer or admin permissions). Currently only the 'status' filter is implemented, but adding others is trivial thanks to an abstracted model and filter support in game.js.

Also fixed some bugs in game.js from last commit.
Uppercased some constants
(#35) Games should default to 'pending' status when created
(fixed #35) Changed to single quotes
Merge pull request #86 from soedar/genre

Added api endpoints for genre (Fixes #84)
Reverse-abstracted everything
Style fixes
Changed stdout / stderr prefixing to use a proper stream.Writable subclass; style fixes
Reorganized imports
Stylin'
Fixed refactoring mistakes
Merge branch 'master' into review-list