Added some docker commands to dump/restore the database
Setup the current Site object in dbreset.py

Added code that sets the current Site to have the correct domain for
docker dev work.  This makes a few URLs work that wouldn't otherwise.
Fix download urls for videos with a newline in the title (#1133)

Changed it so we use the video title rather than the language title
for download filenames.

Changed the way we handle download URLs for the widget.  Now we
calculate the filename in python land and pass it to the widget.  This
makes it so we don't have to write the same code twice to convert the
video title to a filename.
Merge pull request #1135 from pculture/gh-1133

Gh 1133