Add Lua to the makefiles
[HACK] Axe off code that uses Lua internal state
cli frontend: Run a Lua script specified by --lua-script
Don't print an extra newline if a lua message already has one
Move main loop code to a Driver

Maybe this will be enough to implement the emu.frameadvance Lua function?
cli: Implement EMU_PauseEmulation and EMU_IsEmulationPaused
Have configure fail when lua isn't detected
Define HAVE_LUA preprocessor macro when Lua exists
Protect new Lua calls with an #ifdef