Initial draft of the lifecycle article

Some Web Start Kit boilerplate, placeholders around recipes and links to resources, too, but the main bulk is `lifecycle.html`

TODO:
- Add in some templating in lieu of duplicating the HTML boilerplate on each page.
- Figure out the best way of including inline code.
- Think about whether this should live standalone or be integrated into https://github.com/jakearchibald/isserviceworkerready