I'd very much like it, if additional field definitions could be associated with
a (new) gallery template. I often use more than one type of templates on a site.
Additional fields often are used in one of them only.
Additionally, if you wrap e.g. a jquery plugin as a gallery, you often have
additional parameters this plugin supports. (background colors,
border-thickness, setup dimensions - you name it.) It would increase reusability
of theese home brewn templates, if you could use field definitions to support
theese parameters.