Apparent bug in IQM demos.

[taniwha]

I've already sent a message to Lee, so this is more of a heads-up to any engine coders who haven't noticed for themselves.

At least in linux, it seems the demo programs (gpu-demo and demo) render the IQMs with their Y axis flipped. I made a very simple test model (an octahedron) colored so I could easily see its orientation/mirroring. When I checked in the demo, Z was up and X was pointing towards me (as expected), but Y was pointing to the left.

The real Mr Fixit shoots right-handed.