added prison/tech center icon and build-up animation
Added @Nyerguds TD Deluxe Cameo Pack
showcase everything we got icons for when dev cheats on
made Dune 2000 corrinno palace unbuildable again

was just for testing as the devmode build palette is too small
Merge pull request #2886 from Mailaender/community-icons

Added more cameos and showcase everything in developer mode