Two extension points: ``get_package_dict`` and ``transform_to_iso``,
with the same expected behaviour as the old hooks meant to be overriden.
For ``get_package_dict`` we now pass, apart from the generated
package_dict, the parsed iso_values and the harvest object.
Updated docs and added autodocs.
Completely revised and restructured docs to be built with Sphinx.
Structured in logic areas, with a big cleanup and nice formatting.
Revised install instructions.
Added the okfn-sphinx-theme submodule to have a consistent look and feel
with the core CKAN docs, although core docs are using an older revision.