Basic functionalities:

- get the js code to work with DRF (full-AJAX)

- hire a HTML5/CSS designer :-)


Background work:

- use Celery for computation-intensive tasks (generating tiles)

- rewrite the tile generation in Python/PIL

- general js code cleanup (tile display, bearing/elevation computation)


New features:

- Add photos, URL, etc to ReferencePoint model (useful to collect
  information about the reference point: pictures of the building,
  webpage with description, etc)

- Mini-map on the side of the panorama view, many uses:
  - see the current direction of the panorama on the map
  - click on a point on the map to see this point in the panorama

- Provide permalink with a given position in an image (to be able to share
  links like "What do you think <this building> is?")