Use namespace on redis keys

[aaronpk]

The bot should namespace all keys in redis to avoid clobbering the whole namespace. It will need wrapper methods in case other services need to store stuff in redis too.

This change would make it so you could run 2 bots with one redis instance: http://zenircbot.readthedocs.org/en/latest/faq.html#can-i-run-2-bots-in-one-redis-instance

[wraithan]

For 3.0 this is reasonable. It will break all services that have been written so far but that is ok.

[aaronpk]

That's the idea with the 3.0 version, right? :)

[wraithan]

admin.js will have to take this into account when spinning up services.

zenircbot-api will need to be able to pull this out.