* adds file

* tabs to spaces

* test

* small streamline shaderutil

* update solid mode shader

* add placeholder funcs"

* typo

* update docstrings

* add base graphdrawing file

* adds overlay option to nvbgl callback - big step!

* make ready for blankslate nvbgl drawing callback

* adds simple overlay drawing to cb

* rm debug prints

* take into account visible width in nodeview using region.width

* make it possible to view nodes times and graph separately

* rearrange props

* remove unused import

* update comment

* shuffle imports

* remove whitespace