A simple image server written as rack middle ware. Attempts to comply with riapi (https://github.com/riapi/riapi/blob/master/level-1.md)
Illustionist is now a gem istalling should be as easy as:
gem install illusionist
- resizes height and witdh
- defaults height to width if not provided (not quite riapi)
- allows four constraint modes when resizing, max, pad, crop, and stretch
- uses transparent background for padding if the image isn't fully transparent