Moved region_t to region.hpp.
Moved protocol_json_adapter to region_json_adapter.
Removed vestigial uses of rdb_protocol_t.
Moved region_map_t to a new file, region_map.hpp.
Moved code to region_map_json_adapter.hpp.
Moved stuff to dummy_namespace_interface.cc.
Moved inclusions out of dummy_namespace_interface.hpp.
Removed some protocol_api.hpp inclusions.
Removed more unnecessary includes, typename keywoards.
Removed a typename keyword.