upgrade to jackson 2.2.0 and scala 2.9.3
upgrade to jackson 2.2.2 and scala 2.10.2
support case classes nested within objects
upgrade to jackson 2.2.3
support required JsonProperty and PropertyNamingStrategy
Bringing this fork up-to-date with wg/jacks 2.2.3

Conflicts:
	project/build.scala
	src/main/scala/jacks/case.scala
	src/main/scala/jacks/module.scala