Added method getCategories() in AbstractBackendlessGeoQuery
Revert "Added method getCategories() in AbstractBackendlessGeoQuery"

This reverts commit efc2ede49094258bcc00c9bbfb8ac33dfa6a124a.
Added method getCategories() in AbstractBackendlessGeoQuery
Merge pull request #14 from Backendless/T-5131

T 5131 Added method getCategories() in AbstractBackendlessGeoQuery