Powerborne Heroes

Additions:

• Added /powerborne accessory command
• Added first-person blocking model to Vibranium Shield
• Added compatibility with "Back Weapon Slot" mod for the Vibranium Shield

Changes:

• Increased Mjolnir and Stormbreaker call distance
• Removed /powerborne unlock_all_accessories command
• Firestorm's glowing eyes can now be toggled with the Toggle Helmet keybind
• Players with a power granted via /superpower can now wear other armor

Fixes:

• Optimized code, improving performance in multiplayer
• Fixed server crashes
• Fixed Mjolnir call crash