Updated gdata_service_insert_entry and gdata_service_update_entry with calling get_content_type virtual function so it can call gdata_parsable_get_json and gdata_parsable_get_xml accordingly.
Updated gdata_service_insert_entry and gdata_service_update_entry with calling get_content_type virtual function so it can call gdata_parsable_get_json and gdata_parsable_get_xml accordingly.

Pecisk/libgdata,Pecisk/libgdata,Pecisk/libgdata