Update translation for fr_FR

New translations, fuzzy messages and typos corrections
Merge pull request #376 from morhelluin/master

Update translation for fr_FR
add hidden tunable _DISABLE_INACTIVE_FEEDS
new translations
include new lang codes
fix unicode problem from vim
Merge pull request #377 from bbraybrook/extra_langs

new translations
Revert "fix unicode problem from vim"

This reverts commit f33e373e59da004ade97643656f99f860cd34ef4.
Revert "include new lang codes"

This reverts commit e385861ca59abf0b1fc09d008339aaf4966ed0a6.
Revert "new translations"

This reverts commit 087e6e0ee101a4702cf2ece7f41bb7df47d3c2d4.
Revert "Revert "new translations""

This reverts commit e0215e1c0200d7899e381bea51f442e70e9e3645.
Revert "Revert "include new lang codes""

This reverts commit df13793f1cbd42c1298fc0be2d829c2dd290d5a5.
Revert "Revert "fix unicode problem from vim""

This reverts commit 0172de4244c30326dc4f03e08c7110f61c394d44.
include message headers
helps to know what month it is..
fix new .po files headers; rebase translations
add missing .mo files
getPreviousFeed: wrap to last feed to be consistent with getNextFeed
add FEEDS_SORT_BY_UNREAD to blacklist (removed)
catchup_feed: only mark articles as read with non-negative score in fresh feed