New Version 18.11.21

I just pushed a new version to Steam and itch.io which fixes some crashes, some of which were caused by the previous update.

**Changes **

• Tweak: Add grain to the list of resources that can be blacklisted from a stockpile.

• Crash: fix common crash caused by dwarfs trying to get resources that are already in their inventories. (This was caused by the changes to the way stockpiles are managed.)

• Crash: fix rare crash during world generation.

• Crash: fix rare crash when 3D primitive drawer overwrites bounds of cached perlin noise texture.

• Crash: fix rare crash when graphics device is disposed as the sky is being generated.

• Crash: break up the code for rendering the world preview in the world generator so that if crashes occur there in the future error messages are more helpful for debugging.

• Crash: hopefully fix weird crash while pushing participants that are gambling (crash still poorly understood and can't reproduce).

• Bug: fix the gambling pot getting loaded twice from a save file.