Merge pull request #5 from devaroop/master

cater for finding account tags using client gem
Increment version for release
Increment version for release
Add new request parameter for entitlement cancellation
Update version for release
Update latest models after refactoring of killbill jaxrs json models
Merge branch 'master' of github.com:killbill/killbill-client-ruby
Fix issues after jaxrs renaming in killbill
Bump version for release
refund moved to client models