To be reworked as ol.renderer.canvas.VectorLayer
To be reworked for rendering like geoms with same symbolizer
Point, linestring, and linearring coordinates as Float32Array
Going with point, line, and polygon symbolizers

Separate fill and stroke symbolizers make a nicer API, but less efficient rendering
General purpose canvas renderer

Currently only renders points as circles.  Eventually will have methods for other geometry types and other symbolizer types.  Also provides static methods to render point symbolizers (returning a canvas that can be drawn on another).