fixes serialization/deserialization of binary for graphs and jsonschema interface issue
Add better pseudocolor for composite
Large refactor initial commit - terminology changes, storage tiers, versioning
Make FUSE support of keyvalue a build option
Second phase of refactor - key mods, versioning, data
More refactoring focused more at data, key, and graph types
Better naming
Explicitly separate datatype-specific key from context
Rework repository handling and metadata; support versioning and prepare for distribution
Rotational logs and db driver fixes
Clean up datastore package; local dvid commands
merge update from master merge