Script Summary: Inserts a pager at the top of pages which only show a pager at the bottom of the page.
Inserts a pager at top of pages which only contain a pager at the bottom of the page.
This helps to avoid unnecessary scrolling.
Currently adds a TopPager on photostream, favorites and group pages.
* Adjusted IDs of paginated contents after change of HTML-structure on Flickr.
* fixed top pager on photostream pages. Only showed pager on first page due to css class change.