Publish a new version of lua52_sys?

[sunshowers]

Thanks so much for accepting all my changes to hlua! With the release of hlua 0.4.1 I managed to remove all my hacks -- except my workaround for the lack of luaL_ref/luaL_unref in lua52_sys.

I added them in ed51538 -- any chance you could publish a new lua52_sys version with that change? I guess you may also want to bump up hlua.

Thanks again!