Required files
rbconfig
logger
dragonfly/version
dragonfly/core_ext/object
dragonfly/core_ext/array
dragonfly/core_ext/hash
dragonfly/app
dragonfly/image_magick/plugin
dragonfly/file_data_store
dragonfly/memory_data_store
dragonfly/model
dragonfly/middleware
dragonfly/railtie
dragonfly/model/validations