Merge branch 'master' of https://github.com/roundcube/roundcubemail

Andy Wermke

2013-04-04 92cd7f34b07e86062f2c024039e3309768b48ce6

plugins/help/localization/nb_NB.inc does not exist in tree 63b9f39280ebcab80742d9f2b4db6a139c1791e1