Code review comment for lp:~adeuring/launchpad/bug-513382

Thanks for taking on this work, Abel, but this branch needs a bit more work to be ready.

The bug, which is actually bug 513380, has images linked. The color icon has also been updated there as well. These images were prepared by Martin A. to enable us to use a single image for each degree of heat. So the images attached to the bug should be used.

However, we need to add these to the sprites file so that they can be used in that way, rather than hard coding image tags. So some work will need to change the view function that generates the images or else changes to enable a formatter for heat icons.

Cheers,
deryck