Initial implementation of metadata serde
Adding test for metadata serde
Adding metadata to entity and event store along with associated qfd iterators
Trying to preserve space by removing the visibility from the metadata in the qfd stores
Remving duplicate count in metadata serde
Rename BaseMetadataSerde to SimpleMetadataSerDe
Merge pull request #175 from calrissian/metadataSerDe

Initial implementation of metadata serde