New Features
- Support iterables and generators in addition to arrays in functions that take GroupLike parameters. See PtIterable and PtLikeIterabe types
- New Img class to support image loading and manipulations in CanvasSpace. See demo img.pixel
- Util.performance to measure average frame rate
- Added a few convenient functions: Pt.toGroup, Pt.toBound, Num.randomPt
Bug fixes
(thanks @tibotiber and @prkirby)