Content for v0.0.0.10-pre

[dvitski]

Summary of content to-be in the next release

• Multiplayer Compatibility
  • Remove primary player
  • Fix action detection
  • Remove left-click action detection (need another way to activate spells than L/R)
  • Find another way to indicate ability cool downs
• Re-write of health system
  • Base 4 hearts, health boost on top
• Add particle below entities affected by Indomitable Stomp's stun