Allow `HolyLua` to handle debugging of infinite loops of the main lua state

[RaphaelIT7]

When the main lua state freezes due to an infinite loop, I want the HolyLua state to be able to detect this and possibly even recover the main state by forcing an error for example into it to break the infinite loop.

Preferably I should also offload the command queue into a different thread to allow one to run commands while the main thread is dying, though this would be more complex.

[RaphaelIT7]

This will also require a implementation for moving CLuaInterface's to another thread safely, to avoid race conditions or crashes.
Since the HolyLua interface is in early development, not much exists yet making it easy to implement something like that early for it.
The idea would be to wait until the next cycle of the interface, where then we lock it down, move it to another thread, and let it resume, or something like that.