Implement ol.graphics.Drawing and friends
Implement canvas drawing and path renderers
Refactor canvas rendering framework to use ol.graphics framework instead
Refactor styles to use ol.graphics.Drawings instead
Use goog.inherits instead of ol.inherits
Scrap ol.graphics.style.* in favor of flat properties
Only draw a path when we stroke it, allowing linestrings to be chained into a single path
Fix style assignment issues
Switch to using a command array for paths