Add issue 175 note to get_friends.
Remove history scope requirement from 5 methods.
Add depreciated decorator.
Add Moderatable.(un)ignore_reports.
Make test_search_with_time_window unflaky.

Only searching within the last week caused it to fail if not
enough testing had been done within the last week.
Add kwargs to do_relationship.

Arguments sent to the methods using do_relationship will now be added
to the request. This allows users to use arguments that haven't yet
been added to PRAW.
Handle & document get_(dis)liked corner case.