Add image load onerror handler

Make sure, when loading from json, that
a bad image path doesn't fail the desserialization

Signed-off-by: kangax <kangax@gmail.com>
Fix fabric.util.loadImage in node
Build distribution
Support for pinch gesture to scale and rotate objects using Event.js.
Fix toDataURL doc
Do not show corners in groups
Remove unnecessary `e`
Clone options object of animate (to avoid conflicts)
Fix overlayImage not being applied in loadFromJSON under Node
Add fabric.Canvas.prototype.freeDrawingCursor
Merge remote-tracking branch 'jaffer/master'
Move gesture-based logic into a separate module
Bugfix for controlsAboveOverlay (issue #380)

Only if pointer is over targetCorner lastRenderedObjectWithControlsAboveOverlay is used as targetObject.

See issue #380.
Merge pull request #381 from Kienz/patch-1

Bugfix for controlsAboveOverlay (issue #380)
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/image.class.js