[WIP] Scripting

First little glimpse at scripting, based on the current modelconfig branch

We're using the luawrapper of elemate, which currenty only support procedural bindings, no objectbindings yet, that's why I'll wait until I discussed that with @lanice.

Take a look at data/scripts/scenarios/minimal.lua

Would be awesome if one of the windows guys could update the lua lib and cmake and if @xchrdw could install lua 5.2 on the build server.

Enjoy!