Powerborne Heroes

Additions:

• Added "Thunder Jumper" advancement
• Added Mjolnir flight: spin Mjolnir and double-tap space while moving to start flying

Changes:

• Removed boosted flight from Thor when not holding Mjolnir
• Bosses and immune mobs are no longer affected by Void fear or Telekinesis
• Hero suits no longer render when no chestplate is equipped (when the power is granted via /superpower)
• Increased reach distance of Super Punch

Fixes:

• Fixed Mjolnir disappearing in certain situations
• Other minor fixes