Fixed contentSelector & added pagingSelector

Cleaner fix to make contentSelector work properly. Also added support for optional pagingSelector. Allows user to remove entire "paging section" rather than just the next link
Merge pull request #3 from charlester/patch-2

Cleaner fix to make contentSelector work properly. Also added support for optional pagingSelector. Allows user to remove entire "paging section" rather than just the next link.