Doggies now get brushies!

A few updates to help improve mod compatibility and also a change to the Polar Bear shearing mechanic.

• Made the Frostologer and their minions friendly to the Illager Origin (from Mob Origins)
• Switched to a tag based system for frost resistant armors
• Space Suits from Ad Astra now provide Frost Resistance
• Deprecated Item Attribute Modifiers
  • This functionality will work but is no longer supported as it desyncs on multiplayer servers. I plan to add this functionality to Thermoo anyway, with proper synchronization.
• Single Layers of Packed Snow now decay into Snow randomly
• Polar Bears can now be Brushed instead of Sheared, and no longer take damage from Brushing (but they still get angry)
• Ocelots and Wolves can now also be brushed
  • Wild Wolves will anger when brushed