[generic] Use unicode_literals instead of duplicating the u'
[veehd] Send requests twice (Fixes #2102)
[orf] Use new extraction method (Fixes #2057)
[vimeo] Add support for review pages

Since the regexp is already overboarding and review pages have a distinct URL format (with non-trivial stuff after the ID), use a dedicated IE.
Fixes #2106
Merge remote-tracking branch 'origin/master'
release 2014.01.06