Fixed: Comparing unicode literal values (fixed #12)
Fixed: Generating JSON arrays for multi-value attributes
Fixed: Not generating inferred records in JSON encoding.
Added: JSON membership relation with a single entity (in a list)
Release v0.5.1 -- Bug fixes
fix: extra_attributes as a set
Merge pull request #22 from satra/fix/extra_attrib

fix: extra_attributes as a set
Minor code improvements