Wave Defense - Balance adjustments

• Decreased Charlie's health in Wave 2
  
• Increased Bingo count from 2 to 3 in Wave 4
  
• Decreased health of Dalton Soldiers in Wave 6
  
• Decreased health of all 3 Bosses in Wave 6 by 30%
  

These changes should make normal mode easier to solo!
Let me know what everyone thinks!

-W