Environment Content Update — Creator's Asteroid Steam update #704585

Newly Added Maker Tiles: Environment Generators (6) - Gives the room a hazardous environment that either does damage or prevents visibility while in the room. Environment Armor Upgrades (6) - Protects against the corresponding environmental hazard. Polarity Blocks (2) and Polarity Switches (3) - Blocks and switches that operate on "on/off" logic. Arrow Signs (8) - Directional arrows that silently hang from the background. Fixes and Improvements: Starting Items selection now allows selecting 0-8 of each stackable upgrade (instead of only allowing 0 or 8). Starting Items selection now has an option to select All or None of the upgrades through a single click. Tweaked the Demo World. Tweaked the Maker Mode GUI layout. Other assorted bug fixes.