Little Crab FSM Enhanced

This is basically the same "little crab" game we all know and love(?), but here the behavior of the Lobster is governed by a finite state machine (FSM) that uses a Markov chain to choose whether the Lobster will actively CHASE the crab, PATROL back and forth in a straight line, or WANDER around randomly. Lobsters are programmed to "dwell" in their current state for a certain amount of animation frames (act cycles) before they are permitted to change state, which prevents "jitter" that might result from changing state too rapidly