Acidic Boyfriends

Added boyfriends.

• Boyfriends spawn randomly in your world
• A boyfriend can be tamed just by clicking him
• Once tamed, he will follow his owner and can be sat down
• You can heal a tamed boyfriend by clicking on him with food
  • If this doesn't bring him to max health, he will emit smoke particles
  • If this does bring him to max health, he will emit heart particles