BREAKING CHANGE, remove the deprecated Log interface and derivatives.
gfm:image now depends on package ae-graphics, which is CyberShadow package introduced here:
http://blog.thecybershadow.net/2014/03/21/functional-image-processing-in-d/

Deprecated redundant functionality in gfm:image
 - image concept, replace by the one in ae-graphics, which is much superior
 - HSV <-> RGB conversions
 - bitmap and tiled bitmap concrete implementations of image
 - deprecated every software rendering routine