MessageParser: Add support for notices.
Admin & Factoids & Google & Later & Misc & NickAuth & RSS & Seen & User & Web: Update messages.pot
core: Update messages.pot.
Fix typo in conf.py.
Add script sandbox/update_plugins_messagespot.py.
Time: Fix import on Python 3.
Remove randomly failing assertions (race condition with environnements cleaning?)
PluginDownloader: Fix @info for Python 3.
Filter: Fix encoding issue on Python 3.
RSS: Fall back to decoding the headline with 'utf8' if 'ascii' failed.
Alias: Fix @remove for escaped aliases.