Implemented PlayDBPluginAdapter
Removed sonatype snapshots repo from zentasks resolvers
Merge pull request #2 from tkawachi/dbplugin

Implemented PlayDBPluginAdapter
cleanup Build.scala
Merge pull request #3 from xuwei-k/cleanup-build-file

cleanup Build.scala
Fixed typo
2.2.0-RC
Merge branch 'release/2.2.0-RC'