PowerGems

This release addresses some long time bugs such as (but not limited to)

• fixing the allowGemCraftingUsage config option
• making the /givegem command have the correct tab completitions
• fix abilities sometimes triggering twice when interacting with a block
• fixing some edge cases where gems were able to get put into containers although allowMovingGems was false
• rebalancing the strenght arena to make it more powerful and less buggy
• fixing a rare case where gems would disappear if you tried to drop them while allowMovingGems was false and your inventory filled up
• slightly rebalancing air and change it's passive to speed instead of slow falling