Setup redis gem and global

[#58135910]
GameState stores a lineup and the current bases

[#58135910]
GameStates can be told to expire

[#58135910]
Remove old fields from Game model

[#57937866]
Use redis to calculate game state changes

[#57937866]
Use Redis::Namespace gem

[#57937866]
Use ! for verb methods
Use FakeRedis
Merge pull request #8 from kurtisnelson/kurtisnelson_redis

Use Redis for GameState