Hex to image and image to hex

[cmallory183]

I often find myself needing to convert an image to hex to store in a database. While this is simple enough in code, directly editing a database for one-off changes can be a hassle. Having an easy way to take an image and convert it to hex would be very helpful. Adding to that, converting from hex back to a basic image would be great with possible added features of desired image type and size.

[sharevb]

Hi @cmallory183 and @CorentinTh , implemented in #1263