* New refresh mechanism. If the `apos_refresh` query string parameter is present, render only the contents of the data-apos-refreshable div. If not, render that first, then pass it to `outerLayout.html` as the content property, or to another layout if the `outerLayout` option is passed to the pages module. `outerLayout` may be a function if you wish to render the outer layout in your own context.

TODO: make this easy to reuse in custom pageviews not driven by the `apos-pages` module. (So far we don't have any.)