adds memwatch to package.json devDependencies

also adds node-monkey

Conflicts:
	package.json
removes random games handlers in User Disconnected handler
adds small delay before offering rematch in Bot

otherwise the client gets /rematch before the /game_over from the
previous game.  (not a huge problem, and the client should probably
be able to handle it either way, but this it's more realistic this
way as well)
cancels current seek in User Disconnected handler

(github - fixes #22)