RO and FR: update to the core strings
When converting bbcode for Libertree then an empty line has to be before a honrizontal ruler.
Vier: New style "dark"
Merge pull request #1245 from annando/1412-horizontal-ruler-libertree

empty line before horizontal ruler
Merge pull request #1246 from annando/1412-vier-new-style

New style for "vier"
Merge pull request #1243 from tobiasd/20141212

RO and FR: update to the core strings
Fix for issue 1191 - Embedded Youtube video isn't playing when SSL is active
Merge pull request #1247 from annando/issue-1191-youtube

Fix for issue 1191 - Embedded Youtube video isn't playing when SSL is active