Planet Stronghold working

Tested on Ubuntu 14.04. Alt+Tab not working.
This game captures all keyboard input so that alt+tab, adjusting volume via keyboard, etc. don't work. Games linking SDL 1.2 do this while games using SDL 2.0 do not. This is a pet peeve of mine. I added a comment mentioning it for this game. If other people also find it useful and not clutter from too much useless information, I would be happy to update comments for games that I know to do this.