correct histogram for values outside of [0, 255]
add the compression filter
add subtract filter and correct compression filter
add the multiplication by a scalar
first try rand generator
add rand generator test commands
Merge branch 'master' of https://github.com/hataanvnu/ImageProcess

Conflicts:
	src/ar/edu/itba/imageprocess/MainController.java
	src/ar/edu/itba/imageprocess/MenuPane.java
I've done applyAddGaussianNoise, applyMulRayleighNoise and
applyMulExponentialNoise. You can't choose the parameters yet.
added tiny comments