Previously, 'crop' would resize the image to have the requested width, then crop the height to the requested value. This works when cropping images vertically, but not when cropping them horizontally.
For example, trying to crop a 500x500 image to 200x500 was actually resulting in a 200x200 image. Having an OptimizedImage with width/height columns mismatching the actual OptimizedImage width/height causes some unusual issues.
This commit ensures that a call to `OptimizedImage.crop(from, to, width, height)` will always return an image of the requested width/height. The `w x h^` syntax defines minimum width/height, while maintaining aspect ratio.
137e06a316