v0.10- add Whitelist

Whitelist:
if there is a public variable named "LRX_Dog_Allow",
and the player steamID is in this list, then the player can use a dog.

if this variable don't exist all players can have a dog.

this can be done at any time in the game.

how to use:
LRX_Dog_Allow = [(getPlayerUID player1), (getPlayerUID player2)];
publicVariable "LRX_Dog_Allow";