Add CapGallery
Add CapGallery

It's a huge copy-paste of CapVideo, and will have to be factorized ASAP,
though it's going to require more work and thinking, and maybe CapPath.

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