Ignore temporary files.
luaL_reg was deprecated since Lua 5.1.
Its luaL_Reg now.
Force COMPAT_MODE.
Lua 5.2 very dodgy intial porting.
Masterkorp monday mornings style.
Also fuck the Archlinux liblua packager for not adding respecting
compat_mode.
Compiling on Lua 5.2