Teachers are authors when the portal says they are.

[#49085675]
https://www.pivotaltracker.com/story/show/49085675
(cherry picked from commit 7a57476328e58ab4ab345183c48f9ad949fefb5f)
Merge branch 'master' into wip-activity-runtime-connection

* master:
  Teachers are authors when the portal says they are.
Show both relative and absolute paths to images.

[#49085675]
https://www.pivotaltracker.com/story/show/49085675
Merge branch 'master' into wip-activity-runtime-connection

* master:
  Show both relative and absolute paths to images.