Refactor data serialization/unserialization to occur at the Carmen level.
Add freq key to inited cache.
Merge branch 'dev' into freqindex-cluster

Conflicts:
	api-s3.js
Split #index into in-memory indexing (#index) and serialization (#store).
Serialize store writes for now.
More aggressive assumptions about merging.
Merge branch 'dev' into dev-nogyp