Fixes needed for Unix compilation

[turian]

Sorry, I accidentally pushed a few personal things into this PR. But if you're interested, I will clean it up.

I still can't get things running under linux tho: https://github.com/bwhitman/learnfm/issues/4

Here is my best attempt, using Docker, to get it working under ubuntu: https://github.com/turian/dx7render-docker