PRICE - image filtering and manipulation Code

update parameters on value change

finally implement gaussian function

implement boundaries wrapping and use intermediate image for h result convolution

remove hack

first rough implementation with sawtooth

add Gaussian Blur empty shell filter and controller

warning fix, NSImage is returned and is enough

check for nil before accessing method returing a struct

if there is no image, initialize Image Size to zero size for safety

if image is nil do not resize, since we get a bogus ratio