Added more cameos and showcase everything in developer mode

I harvested community sites again:
* Just found [Tiberian Dawn Deluxe Cameo Pack](http://www.ppmsite.com/forum/viewtopic.php?t=14518) by @Nyerguds and added the ones we did not already have.
* Also added a cameo and high quality make animation for the tech center / prison downloaded at http://kilkakon.com/projects.php?category=0&base=Command+and+Conquer (requires attribution) via http://cnc-comm.com/community/index.php?topic=2045.0