- Added GUI (beta!) using /besttools gui
- Added new blacklist command, so that BestTools will not change tools when trying to break those blocks.

Usage:

• /besttools bl -- Show your blacklist
• /besttools bl add -- Adds your currently held item to your blacklist
• /besttools bl add inventory -- Adds all items from your inventory to your blacklist
• /besttools bl add hotbar -- Adds all items from your hotbar to your blacklist
• /besttools bl add <items...> -- Add specified items to your blacklist
• /besttools bl remove -- Removes your currently held item from your blacklist
• /besttools bl remove inventory -- Removes all items from your inventory from your blacklist
• /besttools bl remove hotbar -- Removes all items from your hotbar from your blacklist
• /besttools bl remove <items...> -- Remove items from your blacklist
• /besttools bl reset -- Removes all items from your blacklist