Work on moving to scala 2.10.
Proper dependencies for scala 2.10.
Getting serialization working again without jackson.
Merge branch 'master' into scala-210

Conflicts:
	build.sbt
	src/main/scala/Jsonz.scala
turning on deprecation/feature warnings and fixing them
updating to 2.10.1
Fixing marshallers for spray 1.1M8.
Fixing spray unmarshaller to match on content type instead of media type.