Infinite scroll prompts user before paging after 4 pages #2680

Paging will continue to be done via ajax inserts, but every 4 pages (configurable in view) will give the user a more link isntead of automatically paging.  This lets you reach the footer.

Please also review the patches added to the drush make file.  Most of the work is in those and they haven't been reveiwed by anyone yet.

#2680