An in-browser checklist with storage persistence.
Create a checklist using markdown. Go to the page. Checked items will be saved locally.
The default checklist is stored in checklist.md. Define new checklists using Markdown. To load additional lists,
pass the filename via a parameter. E.g., https://ual-re.github.io/localchecklist?checklist=samplechecklist.md. The file
must exist in this GitHub repo.