Fix #571: Footer broken on RTD site
Remove stuff that's not needed for the theme
Update copyright

The copyright in the build configuration file shows in the default
footer.
Hide default footer in docs by hiding default copyright

The default footer only consists of the copyright statement, so we
can get rid of the footer by not showing the copyright.

Instead we show a custom footer thanks to @umcsdon.
Refactor recording api methods and fix logic

Refactored code of recording api setup, teardown, and
endpoint functions.

Changed Multimedia current_state enum from ints to strs to make some code
in recording api cleaner. Changed a test in test_multimedia.py that
broke as a result.

Fix to recording api logic determining next_id.
Fix to test_server.py teardown to undo patching to media_dict
Flattened if/then nests, removed unnecessary int casts
Fixed off by one error, code cleanup
Restructured try/except block for recording setup
All blueprint teardown code now automatically called from server module on server teardown
Implemented shelf in recording.py, modified tests.

Implemented shelf, a persistent object, to incrementally save videos as
they are added, modified, or deleted. This allows us to shut down the
server without needing any teardown, everything that needs to save on
server shutdown will already have been saved.

I had to make changes to the testing suite as a result. Since I noticed
it would be much easier to use fixtures, I decided to change the setup
and teardown of tests from xunit style to fixture style.