Removed imageSmoothing from cache-canvas.
Added `fabric.Path.hitPath` to use in `hitMode`
improved error reporting for `loadScript` and `loadImage`
Removed unused portion of `object.setCoords`
Added support for invariant stroke width - via `strokeWidthInvariant`
Modified the Polygon & Polyline classes to remove `skipOffset`, also added `Path2D` rendering support.