Remake Notes folders with `start_paper`

[drphilmarshall]

And give each Note it's own issue and branch. Might want to upgrade start_paper to capture metadata first.

[drphilmarshall]

OK, start_paper upgrade is done, metadata asked for and then stored is:

{
    "authors": "{{ cookiecutter.authors }}",
    "title": "{{ cookiecutter.title }}",
    "description": "{{ cookiecutter.description }}",
    "short_title": "{{ cookiecutter.short_title }}",
    "serial_number": "{{ cookiecutter.serial_number }}",
    "repo_name": "{{ cookiecutter.repo_name }}",
    "folder_name": "{{ cookiecutter.folder_name }}",
    "default_format": "{{ cookiecutter.default_format }}"
}

[drphilmarshall]

This is loooooong overdue. Step one is to trash the existing notes, before starting branches for the existing ones. Looks like no-one has pushed to the notes in master since last fall, so I'll salvage the design note into its new branch, and trash the rest. The reason for working in branches is to be able to use the PR review mechanism for task force review of what we write.