Fixed pagination while browsing tag views.  Minor cleanup.

Rewrote fof_db_get_item_count() to return proper results for multi-tag itemsets.

Queries which returned 'feed_id' fields as 'id' now just return them as 'feed_id'.

Renamed some bound-parameters to match their variables, for clarity.

Started to add some smatterings of rudimentary javadoc-style documentation to functions.