Pet Property: friendliness table - key:user, value:integer

Behavior - show friendliness via floating hearts

Triggers:
increaseFriendliness (user, value) - increases friendliness for the user by value  
reduceFriendliness (user, value) - reduces friendliness by value
claimPet (user, <pet_info>) - attempts to register pet with pet.sanctuary.org
petClaimResponse () - handles response from webrequest to register pet

Exposed function: 
int getFriendliness() - returns current friendliness