[#2417] Add time_since_download and time_since_upload to torrent status
Add torrent bandwidth priority to core
Remove unneeded old 'public' option code
Mark set_torrent_* methods deprecated
refactor torrent.set_options
Move owner to torrent options
Add name to torrent options
Very large refactor and cleanup of torrent.py

Use new docstring format and added to all funcs
Pylint and flake8 fixes; only a few warnings remain for pylint
Fix comment quotes changed by previous commit