Drop support for python 2.6 and 3.2.
Update docs.
Update requirements.
Make tests run on skosprovider 0.4.0.
Expose notes on SKOS Collections.
Bump skosprovider requirement to 0.4.2.
Add concept_scheme info to concept and collection details.
Expand conceptscheme endpoint.
Expose matches on concepts through the REST interface.
Add subordinate_arrays and superordinates.