New industrial tiles, New Tux statue, other misc tile changes

[Frostwithasideofsalt]

-New industrial tiles, with more slope variants, a 3x3 plate, and unisolids.
-Add new tux statue, and reduce color bleeding on nolok statues.
-deprecate "plant1" from doodads tiles folder
-Darken pillars to make them more easily distinguishable as non-solid
-Darken "pedestal", and make it non-solid
-Update chocolate blocks so that their design reflects the bridge block designs
-bridge block designs have a 1x1 variant
TODO:

• touch up tux statue sprite
• add iiv2 danger tape sprites
• retool area51 to use new industrial sprites
• touch up chocolate blocks