Bug fix - creeper explosions close to boats will not cause console
error.
Bug fix - glass bottles filled from a single water source block are
marked correctly as acid now.
Added license notices.
Fixed kitty cannon console errors - again.
Added code to explictly make sand have data of zero - odd values were
cropping up for some reason - during island creation.
Added ability to set buy and sell prices in minishop.
Code clean up.
Added friendly names to challenges.
Refined challenge rewards and requirements based on gameplay testing.