Allow custom redis client

[tobyhinloopen]

Closes #17

Basically allows you to pass an existing redis client instead of passing host, pass, etc.

client: Redis.createClient()

Please review @dabroek . Change suggestions are welcome. I'm not sure how to thoroughly test my change without just copying all tests.

[coveralls]

Coverage increased (+0.04%) to 96.098% when pulling 39e62f2 on Hockeybond:17-allow-custom-client into ecbfb29 on dabroek:master.

[coveralls]

Coverage increased (+0.04%) to 96.098% when pulling 39e62f2 on Hockeybond:17-allow-custom-client into ecbfb29 on dabroek:master.

[gfzabarino]

Is there a reason why this isn't getting merged?

[felinto-dev]

Excellent! It was exactly what I am looking for.

@tobyhinloopen could you provide minimal documentation on how I can pass a REDIS connection URI instead AUTH, PORT, etc. ?
I would use Heroku REDIS Cache. I believe that this is a common use case.

[tobyhinloopen]

I think this isn't being merged because IIRC it doesn't actually work. You need a separate Redis connection and it will consume/lock the connection. If you reuse the connection, it will no longer function for other users of the connection.

Disclaimer: It has been a while, I forgot the actual details.