Ported Fort Lonestar to Lua

A quick and simple conversion of the infamous stress-test benchmark *errr* popular minigame https://github.com/OpenRA/OpenRA/blob/06b797fd14d25112afcf63ba153bffd439568816/OpenRA.Mods.RA/Missions/FortLonestarScript.cs I did this to test the new Lua bindings. You currently can't win this. Not because it is so damn hard, but because `MissionAccomplished` is not yet implemented. =) I removed all the bit-rot in the rules I could find, but there is still a lot to do. The code also needs a better structure.