Croppie is mutating images incorrectly

[MatthewAry]

Left is Croppie's output, Right is the original image. Taken from the demo site. Note how the resulting image is warmer than the original?

Also, when exporting a png with a circle crop, the alpha channel part of the image is a light, transparent grey, and not purely transparent pixels. See Below.

Lastly, on the circular crop, the aliasing of the circle can cause white pixels to show up on the edges of the circle.

This behavior was seen on: Chrome Mac Version 61.0.3163.100 (Official Build) (64-bit)