minimal change-set to support play 2.2 compatibility
Update to play 2.2.0-RC2
Fix warnings due to deprecation of most Result-like interfaces in play 2.2
Updated and cleaned up SBT configuration

Migrated from Build.scala to build.sbt as it is now supported by play
Cleaned up repository references and resolvers
Updated SBT settings for scala demo sample
Fix extra/missing newlines in SBT settings
Remove manual jackson dependency and let Play pull the desired version
update to released play 2.2.0