Feature Request: Option to add bleed

[cortis]

Currently some Kite products will wrap their content over the edges (e.g. Stretched Canvas, (could possibly also apply to phone cases)). This is good in some cases but can result in unwanted cropping of the image subject. A valuable alternative to cropping would be to allow the customer to add a visible bleed to the image so that the content is shown entirely on the face of the product and the edges show a solid color. This solid color should be configurable by the end user but could be informed by the 1st party developer using the SDK (e.g. if an item is isolated on a solid monochromatic background, it would make sense for the border bleed color to match the background color of the image).