Changed the gearscore formula for epic items to be level agnostic -> FIX for SoD

[gk646]

This is an easy but major change. This will change the gearscore of all epic items below level 120 but is adjusted to result in a close value. I did some calculations for new and old gearscore for 2 handed weapons and the classic modifier:

• Level 30:
  • Old GearScore: 12.41
  • New GearScore: 62.06
• Level 45:
  • Old GearScore: 58.96
  • New GearScore: 93.09
• Level 60:
  • Old GearScore: 105.50
  • New GearScore: 124.12
• Level 90:
  • Old GearScore: 198.59
  • New GearScore: 186.18

The issue: #46