Some small changes.
o Removed query_tag_callers and query_container_callers, they are not needed if the functions are named correctly.
o Renamed all container functions to container_*, all tag functions to tag_*, and all functions formerly named tag_* that was actually not tags to internal_tag_*, or similar, depending on their usage.
o Added <cset> again
o All 'object id' -> 'RequestID id'