Adding EmoteType 72:Generate

Added Emote Type 72 "Generate". Functionality allows for creatures to spawn other creatures from their generate table on demand. -NOTE: Creature weenie INIT_GENERATED must be set to 0. -Type 72 emote uses "amount": field to set INIT_GENERATED before calling weenie factory to initialize generation process. -Updated qualities.cpp to reflect loading of "amount" variable into type 72 Generate_emotetype.