Solved the issue 364 via adding auto_reconnect option

First of all, thanks for this gem and please let me know how to improve my code. I really need this options in the official repo :) so let me help to get it done.
I had problems with the Redis exception "Tried to use a connection from a child process without reconnecting. You need to reconnect to Redis after forking." When performing a stress test against a rails-api that implement a pool connection against redis. The server has Apache2 and passenger installed. 

The stress test attempts to perform 500 request per second and the app collapsed in the number 100 for the above exception. After this fix (in this pull request) the app reach 450 in average. 

Regards