1.0.6 Copper tools

Changelog:

• Added copper tools
• Tweaked tools' characteristics (mostly break speed)
• Tweaked loot tables (decreased chances)

1.0.4

Added emerald armor items, added new items to loot tables and created new recipes.
Added new achievements, related to the new armor. Updated achievements' names.

1.0.3

This is the first github release. It contains:

• All fully-working emerald tools with crafts
• Loot tables for these emerald tools