raise custom exception for unknown types
don't return index query with value None
Merge pull request #27 from onefinestay/index_query_for_none

don't return index query with value None
better name
Merge remote-tracking branch 'origin/master' into unknown_type
Merge pull request #28 from onefinestay/unknown_type

raise custom exception for unknown types
mergin master, adding tests
Merge branch 'dynamic-types' of github.com:onefinestay/kaiso into dynamic-types