vimeo: Fix for no-embed videos
vimeo: Fix for no-embed videos

Some videos like http://vimeo.com/61275290 have restrictions
on embedding, which makes the usual JSON url fail.
So we first try to parse the JSON data directly from the
script element in the page.

Signed-off-by: François Revol <8659535ba7f03848514a2a675aacecde586da871@free.fr>

willprice/weboob,frankrousseau/weboob,willprice/weboob,Boussadia/weboob,Konubinix/weboob,Boussadia/weboob,nojhan/weboob-devel,laurent-george/weboob,sputnick-dev/weboob,yannrouillard/weboob,yannrouillard/weboob,laurent-george/weboob,sputnick-dev/weboob,frankrousseau/weboob,franek/weboob,nojhan/weboob-devel,Boussadia/weboob,laurent-george/weboob,franek/weboob,Konubinix/weboob,RouxRC/weboob,nojhan/weboob-devel,RouxRC/weboob,yannrouillard/weboob,RouxRC/weboob,willprice/weboob,sputnick-dev/weboob,franek/weboob,Konubinix/weboob,frankrousseau/weboob,Boussadia/weboob