Merge from master into 34-datasets-unified-schema
Merge branch 'master' into 34-datasets-unified-schema (implemented #30)
Merge branch 'master' into 34-dataset-unified-schema
Created internal api tests
Merge branch 'master' into 34-dataset-unified-schema
Merge remote-tracking branch 'smanousopoulos/34-datasets' into 34-dataset-unified-schema
Reviewed functional tests. Updated API tests according to #53.
Merge branch '34-dataset-unified-schema' into 41-unicode-serializers