Increase minimum threshold for barrel damage to reduce likelihood of blowing one up on jumping out, increase damage to compensate (may need tweaking). Only apply dX for collision w/ kick if barrel is rolling.

foreach(dir
    British
	Classic
	Default
	Mobster
	Pirate
	Robot
	Russian
	Singer
	Surfer
	)
	add_subdirectory(${dir})
endforeach(dir)