Updates to the Database
-- added remove older than
-- added get_reddit
-- added remove_reddit
-- added set_blacklist
-- added set_strikes

Signed-off-by: arghdos <arghdos@users.noreply.github.com>
Updated the DataExtractors to return a channel_id, channel_url tuple

Signed-off-by: arghdos <arghdos@users.noreply.github.com>
updated data extractor tests
updated database tests
updated blacklist and related tests
minor improvements to the database
minor pep fixes