1.2.2 Release

# 1.2.2 (29 July 2014)
## Bug fix
 - Updated README.md to briefly explain what curator does #117 (untergeek)
 - Fixed es_repo_mgr logging whitelist #119 (untergeek)
 - Fixed absent `months` time-unit #120 (untergeek)
 - Filter out `.marvel-kibana` when prefix is `.marvel-` #120 (untergeek)
 - Clean up arg parsing code where redundancy exists #123 (untergeek)
 - Properly divide debug from non-debug logging #125 (untergeek)
 - Fixed `show` command bug caused by changes to command structure #126 (michaelweiser)