Replaced playground_memory.wav with Maxwell purring, so he purrs when you pick him up instead of giving you nightmares.

Undid changes to game_sounds_items.txt by moving it to a disabled folder within the scripts folder, just in case it's needed later when I figure out how to get the meows from there rather than the direct .wav

Added Argemwell and Gnarpwell from Voices of the Void. To select them, look at Maxwell and type ent_fire !picker skin 1 or 2 in console.