Localisation updates from http://translatewiki.net.
Update rails to 2.3.10
Stick with therubyracer 0.10.x for now

The 0.11.x release is a complete mess, as amply documented in the github
issue tracker (https://github.com/cowboyd/therubyracer/issues/215).
Merge remote-tracking branch 'origin/master' into owl-history-tab
Adjusted popup UI.