WIP embedded counter in map is a different type
Use the embedded counter mod inside the map
Update tests to use the embedded mod map
doon't export binary() as an opaque type

Opaque types should be unique.
Remove map "add field" operation from API
Adjust line numbers of generated code in riak_core_pb.
Merge pull request #951 from basho/feature-bug/rdb/removes-remove

Use the embedded counter inside the map

Reviewed-by: seancribbs