- deluge: b64encode returns bytes, transform into string before
serializing to JSON.
- deluge: no more need to try different encodings for the torrent
filename or the base64-encoded content, should all be unicode strings
with Python 3
- collections.abc: Iterable, Mapping, MutableMapping, MutableSequence
moved from collections to collections.abc since Python 3.3
- pygazelle: html.parser.HTMLParser().unescape() moved to
html.unescape() in Python 3.4