Increase melee XP/gold multiplier + rewards for the shielders

[Handef_Snizel]

• Shielder recieves the XPs and gold for the damage (invent some multiplier) that his shield recieved and the "damager" is killed
  
• Shielder recieves the XPs and gold for the damage that his shield recieved

Not sure I quite understand, but this could be easily abused, if myself and a friend joined a server and just stood their hitting each others shields, then repairing as the shield would break, we would still get the gold and assist.