Persistence within Redis directly

[fengb]

Using Redis will allow ab_users to persist across sessions or machines.

Cases where existing persistence cannot guarantee similar behavior:

• User who logs out and back in
• User who uses different machines (work <=> home)

[coveralls]

Coverage increased (+0.09%) when pulling 07251b1 on enova:redis-persist into 87da249 on andrew:master.

[coveralls]

Coverage increased (+0.09%) when pulling a53e5de on enova:redis-persist into 87da249 on andrew:master.

[andrew]

This looks great, I'll merge it in now, hopefully get a release out next week.

Cheers!

[andrew]

I've shipped this in v0.6.5 now: https://github.com/andrew/split/releases/tag/v0.6.5

Thanks!