[gphoto] Add fast mime-type information
[gphoto] Add fast mime-type information

See https://bugzilla.gnome.org/show_bug.cgi?id=594928

philipl/gvfs,philipl/gvfs,xkahn/gvfs-cmis,xkahn/gvfs-cmis,cpatulea/gvfs,gicmo/gvfs,gicmo/gvfs,gicmo/gvfs,gicmo/gvfs,xkahn/gvfs-cmis,halfline/gvfs,halfline/gvfs,philipl/gvfs,cpatulea/gvfs,xkahn/gvfs-cmis,halfline/gvfs