Required files
dragonfly/image_magick/analysers/image_properties
dragonfly/image_magick/generators/convert
dragonfly/image_magick/generators/plain
dragonfly/image_magick/generators/plasma
dragonfly/image_magick/generators/text
dragonfly/image_magick/processors/convert
dragonfly/image_magick/processors/encode
dragonfly/image_magick/processors/thumb