Update sbt-pgp from 0.8 to 0.8.2
Update scalaVersion from 2.10.2 to 2.10.3
Update specs2 from 2.1.1 to 2.2.2
java.lang.UnsupportedClassVersionError: Unsupported major.minor version 51.0
Update sbteclipse-plugin from 2.3.0 to 2.4.0, sbt-idea from 1.5.1 to 1.5.2
scalacOptions ++= Seq("-deprecation", "-feature", "-unchecked")
Update Akka from 2.2.1 to 2.2.3