ofNode should have a draw(float size) option

at the moment, ofNode has a draw function that has awkwardly hard coded sizes:

virtual void customDraw() {
ofBox(10);
ofDrawAxis(20);
}

I'd like a draw(size) option. obviously I can extend ofNode and create my own functions, but if I just draw a node, I might want to adjust the size internally, as the "10" and "20" might not make any sense based on where I am drawing, for example here:

http://imgur.com/idWPp

looks quite weird, but at 1/10th the size would look ok.

as most other OF objects have draw(size) options, I think ofNodeShould have this too.

Start at ofNode's draw and customDraw methods, where the hard-coded ofBox(10) and ofDrawAxis(20) calls are shown. Compare how other openFrameworks objects expose draw(size) options, then determine the smallest compatible way to make the node's displayed size adjustable. Done means callers can draw an ofNode at a requested size without relying on subclass-specific functions.