Merge pull request #4 from sittercity/SIT-1347

SIT-1347 added a redis storage class
SIT-1347 gemfile version increment
SIT-1347 bumped major version because it's possible that the changed namespaces could impact other projects
SIT-1347 made rcov work
SIT-1347 changed rcov folder and formatter
SIT-1347 bbox wasn't returning dates correctly when checking the latest time