V7's Mining Additions

Mining Hammers:

• Honed in the AoE selectors position to make the mining feel better
• Increased the AoE for Thorium and Mithril, bringing it to a 4x4x2 AoE
• Added logic for 5x5x3 AoE for missing levels

Exavators:

• Honed in the AoE selectors position to make digging feel better
• Increased AoE for all excavators to make the consistent with the mining hammer changes
• Added 5x5x3 AoE logic as well

Lumberaxes:

• Added prototype 3x3x1 axe replacement for large scale wood removal