Add support for Snapshots including Snapshotoffer and snap
Merge branch 'master' of https://github.com/tsindot/io-straight-fw

Merged contribution from tsindot supporting Snapshots (#12) and simple trait for Sharding (#6)
Snapshot implementation is as per the akka configured snapshot serializer.
See http://doc.akka.io/docs/akka/snapshot/scala/persistence.html#Snapshots for more details
Conflicts:
	src/main/scala/io/straight/fw/service/AbstractProcessor.scala
	src/main/scala/io/straight/fw/service/Repository.scala