Starting to add input_algorithms for images
Images need to be added after tasks

Otherwise access order means the images are never normalised, because it
gets to the 'images.<image>' from the task first
Using input_algorithms.dictobj instead of namedlist
Fixing tests for task option_spec objs
Starting to write tests for configuration collection
Simplifying task_spec
Changing how overview organises the configuration
Adding an input_algorithms spec for lists of multi items
Moving out logic from imager
Adding a --debug option
Upgrading delfick_error
Don't need to convert all the images here
Fixing usage of conversion
Fixing env_spec
Implementing some of the command spec
Fixing some harpoon_spec options for images
Only spit out source in formatter where it makes sense
Removing the ``this`` option when formatting

It requires getting the parent of the path, which is not always possible
to determine unambiguously
Consulting image_configuration for values
Use many_format instead of formatted