Merge pull request #131 from zarry/2.0.0_wip_manageconfig

2.0.0 wip manage config
Changes default behavior of sentinel to manage the config file

Just keeping in line with previous behavior.
Bumps default redis version to 2.8.13.  Releases version 2.2.0
allow sentinel manage_config attribute to control both redis configs as sentinel is responsible for updating both configs upon state change