Create simple lobby system and games that track status.
Refactor game service and style lobby.
Init express 4.0

See #32
Using `npm i express-generator -g` to build 4.0 project

There are some new concepts with express 4.0 and it makes more sense to
generate the scaffolding off the bat.
Serve up files using express static for now

See #33
Add engines and Procfile

See #33
Merge branch 'feature/express-heroku' into develop

Closes #33