Add javascript to detect and update broken images.

This commit adds javascript code that detects broken profile images on
the site, and requests the server for an updated profile images.  The
server makes and API call to the HS server to obtain latest user
information for the corresponding user and returns a new image url.
Add the image fixing javascript to the frame page.
Translate HS API response to our model attributes.
Merge pull request #65 from sursh/fix-broken-profiles

Fix broken profile images