Redis module for Site package.
Config options for Redis.
Merge branch 'fix-gearman-error-handler' into add-redis-module
Merge branch 'fix-gearman-error-handler' into add-redis-module
Improve connection handling in Redis module.

Now does a lazy connect and maintains connected/disconnected status when
running commands.
Make Redis module support specifying port in config.
Fix variable name.
Add basic test case for redis module.
Add documentation.
THis file doesn't need to be required.
Merge pull request #9 from gauthierm/add-redis-module

Add Redis module