The iterator known as _L, besides having an absurdly poor name,
clashes with standard headers on OpenBSD -current at the time
of writing. This commit is the minimum needed to build on
OpenBSD with an updated C++ standard library.
This adds a utility library for handling all the nasty lua referencing
stuff. It also provides functions for convienent usage of lua objects
such as tables and functions which allows to use them directly from C++
code without using the ugly Lua C-API.
oldlaptop