Rename incorrect Norwegian code "no" to "nb".


git-svn-id: http://blockly.googlecode.com/svn/trunk@1495 c400ca83-b69d-9dd7-9705-49c6b8615e23
Localisation updates from http://translatewiki.net.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1496 c400ca83-b69d-9dd7-9705-49c6b8615e23
Localisation updates from http://translatewiki.net.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1497 c400ca83-b69d-9dd7-9705-49c6b8615e23