flickr: connect to credentials-changed and refresh (BMC#1457)
flickr: connect to credentials-changed and refresh (BMC#1457)

A cleaned up version of a patch from Gary Lin <glin@novell.com)

lcp/libsocialweb,lcp/libsocialweb,GNOME/libsocialweb,ThomasBollmeier/libsocialweb-flickr-oauth,GNOME/libsocialweb,ThomasBollmeier/libsocialweb-flickr-oauth,GNOME/libsocialweb,ThomasBollmeier/libsocialweb-flickr-oauth,lcp/libsocialweb