Updated demo version returned to Steam.

So if you want to torture someone by making them try out the game... you can.

I've adjusted the code to make demo building easier, so if I ever need to update it I won't need to suffer through duping the entire project to make changes.

Also a minor update was pushed to fix a graphical glitch in the first level because the crowd didn't render properly. Why? I don't know. Build vs Editor differences are dumb. If there's anything else broken, let me know. Still all ears on this.