Added repository recreation app (copies a repository and stores in latest format compressed)
A custom map reduce job is used to recreate factsets
added the recreate app as an ivory app
reverted the changes on NamespacedThriftFact which is mutable. fixes #133
added back a FIX comment
better name for the recreate app on the command line
removed operators on FeatureStores
removed the xerial snappy codec for now
refactored MR code between ingest and recreate
added the missing version file on the factset
Merge pull request #132 from ambiata/recreate_repo_app

Added a repository recreation app