measures/passage — pull request #17 by d2fn (2014-04-21 06:17:11+00:00)
Title: misc progress

* tweening incl tweenable Projectable2D
* Rect2D plus Sketch reporting its Rect2D view as `viewport()`
* dendrite cell implementations in 2d and 3d
* circle packing stuff
* mapping of normalized 0-1 values to a color spectrum in `loadSpectrum()`