Displays are almost complete

A few niggles about which way round things should be. The UpFront Display is now working as it should. Buffers are being created and freed properly, a LUA bug squashed.

Dave is starting prelim work on the interactive base objects used in game flow, briefing, arming, campaign progression leaving me to get on with finishing up the helicopter wiring job. A lot of code has been waiting to show itself, now it has the opportunity. I must fix the TrackIR support though, I think I busted my pro-clip. Darn. Time to get on with it.