Localisation updates from http://translatewiki.net.

git-svn-id: http://blockly.googlecode.com/svn/trunk@1130 c400ca83-b69d-9dd7-9705-49c6b8615e23
Add redirects for Turtle.  Make redirects language-aware for all apps.  Add redirects from old vn to vi.

R=spertus@google.com

Review URL: https://codereview.appspot.com/11657043

git-svn-id: http://blockly.googlecode.com/svn/trunk@1131 c400ca83-b69d-9dd7-9705-49c6b8615e23