my_model_customisations_arent_picked_up now lives in a subsection of the
recipe how_to_customise_models.
The old conventions.rst is now merged into the new coding-style.rst.
The old search.rst has been dropped as it seems outdated.
To set a base for upcoming docs changes, the docs directory structure
has been streamlined to follow a simplified version of Django's docs.
The old _draft folder has been removed. Both files from there and the
current docs that don't fit nicely into the new structure are in _old/
for the moment.