Removed std::unordered_map storage on tables since they were getting deleted anyways.
Memory leaks are currently present: will have to figure out how to patch those up.
Okay, cleaned up includes and now the newest feature:
STATEFUL FUNCTIONS!
Any stateful function now works and is properly cleaned up, thanks to some additional metatables that are associated with the function values.
This lays the ground work for class bindings, but that's a far off dream. For now, table retrieval and `operator[]` is what's for dinner.
Merge branch 'master' of https://github.com/ThePhD/sol into ThePhD