Issue #19: Move paging and count methods to new package/class
(listing.pages.PageHelper)
Issue 19: Move article listing code to single universal method
Issue #19: Add paging to article lists
Issue #19: Move index listing to general_listing
Issue #19: Center page number list
Issue #19: Fix article count request not carrying over between pages.
Merge pull request #25 from rogerskw/iss19

Fix issue #19