added a test if twitter fail, the what's new page  will still be displayed
added a test if twitter fail, the what's new page 
will still be displayed


git-svn-id: 776ea4b3e47339c5b8782ec5e9346c740e073fb4@783 e0e46c49-be69-4f5a-ad62-21024a331aea

hans/tatoeba2,hans/tatoeba2,hans/tatoeba2