Noise Tool "completed"

A couple of hard days work later and it's done! (Well like 98% done anyway).
You can now save and load hierarchies (as xml files) and also spit out a png file if you wish.

Also added a couple of modules I thought was missing, Random (which makes absolutely random noise), LinearGradient (a horizontal/vertical gradient) and Split (takes a range of values and outputs only two values selected by a threshold).

The only thing left really annoying me is that when you load in a hierarchy, all the windows positions get's reset, so you have to drag them back in position.
A undo/redo history would be nice but out of scope for the time being.

An screenshot of the finished tool:

Example use case: