testing indexes on biz keys and refs
added optional schemaCallback to resource
Merge pull request #16 from flyvictor/schema-callback

Added schema creation callback
Merge pull request #17 from flyvictor/indexes-on-pk-and-refs

indexed business keys and refs
replaced pkTypes with types in tests to check they would still pass
Merge branch 'master' of github.com:flyvictor/fortune into transforms
fixed tests