Each topic can now have its own podcast stream. Teachers
have to manually turn on the podcast for the topic, and
can specify whether student comments show up in the stream
or not.
fixes#3538
Change-Id: I19b1b44fc2eec864cfeb298163ef34a0b0181067
Reviewed-on: https://gerrit.instructure.com/2369
Tested-by: Hudson <hudson@instructure.com>
Reviewed-by: Brian Palmer <brianp@instructure.com>
Brian Whitmer