fix trickle waves
remove spaces from content filenames
fix burst waves
really fix trickle waves
obstacles working
obstacle trickle spawning
fix obstacle respawn frequency bug
allow variable gravity sensitivity for physical bodies
obstacle destroy effects are applied to units
add cryobarrel effect
lock explosion in place on obstacle destruction
fix barrel exploding particle effect update glitch
add generic circle particle and tweak explosion effect
fix shatter effect
shatter effect for obstacle destruction
increase exploding barrel radius
allow non-ice shatter effect