RSS: Change 'New news' to 'News' in announcements

'New news' sounds redundant, and the plugin is known for reannouncing
olf headlines anyway. ;)
RSS: Update translation files
Make supybot.reply.oneToOne not always true on channels.
src/conf.py: use ISO 8601 in reply.format.time.

If I read the code for Time correctly, it uses this value by default. I
think that this fixes #701 .
Merge pull request #703 from Mkaysi/time

src/conf.py: use ISO 8601 in reply.format.time.
Merge pull request #626 from nyuszika7h/rss-announce-prefix

RSS: Change 'New news' to 'News' in announcements
RSS: Update l10n-fr.
check_trans.py: Ignore Ctcp and Owner. Closes GH-630.
Update CONTRIBUTING.md to include guideline on internationalization. Closes GH-633.
RSS: update l10n-fi.
Misc: update l10n-fi.
i18n: Fix internationalization of command help.
i18n: Cleaner code and potential bug fix of multi-line translations.
Merge pull request #705 from Mkaysi/l10n-fi

RSS & Misc: update l10n-fi.
Fix previous commit.
ChannelLogger: set FlushImmediately to True.

* This is default behaviour with ZNC and some other IRC related applications.
* Users are often confused when the logs don't appear.
* The logs will less likely get lost if they are written immediately.
* Gribble is doing this too (but not by default).
Relay: set NoticeNonPrivmsgs to True.

Please see https://github.com/TkTech/notifico/issues/79

* > There is a difference between a NOTICE to a channel and a NOTICE to a user, every client should be able to correctly display notices to a channel. ~~ @Dav1dde

* > They should, but they don't. ~~ @Mkaysi

* > That's besides the point. There are a lot of clients that do handle it properly, and if they don't then that's not notifico's fault, that's their own fault. ~~ @sckasturi
Revert "Relay: set NoticeNonPrivmsgs to True."

This reverts commit cc8f96eeaca9dd0209e1ba1bc1aeb3dcfd4bc135.
Config: Prevent variable creation when trying to get the value of a channel-specific variable for a non-channel.
Ctcp: Fix name-crash which made --nicks always interpreted as true. Closes GH-664.