1.0.5: Minor quality of life improvements

- UI footer now sticks to the bottom of the page, even if the page
  contains little content
- The demo script generated by --demo is now a little more interactive,
  to demonstrate the websocket features of the UI
- The resubmit button has been fixed and will now correctly refresh the
  page afterwards
- The "download request (debug)" button is now less prominent
- The documentation now contains an architecture diagram
- The README now contains up-to-date links