Added a batch-size option to update_index task.
Revert "Added a batch-size option to update_index task."

This reverts commit a853fa54ca1e660603389c82d99717d9ffe3bbff.
Revert "Included thumbnail urls in the search index. Switched Album Detail, Search, Image List, and Album List pages to use urls for thumbnails."

This reverts commit 025c4e1d09b0d9ab1e3fbe0ad696b8755c5c13bc.
Revert "Converted Album Detail page to use SearchQuerySet instead of the default QuerySet."

This reverts commit 6f55a2ac5c05beff4d5c7b221dec4212b66b70d2.
Revert "Converted Image List page to use SearchQuerySet instead of the default QuerySet.
Revert "Converted Album List page to use SearchQuerySet instead of the default Queryset."