Fix ObjectId deserialization.
Add String#constantize refinement.
Refactor UpdateSiloWorker.
Whitespace.
Add version field to Silo.
Add version DSL.
Whitespace.
Blank lines.
Implement silo versioning.
run specs on 2.0.0
Merge pull request #2 from musicglue/versioning

Versioning merged in, thanks @tobiassvn