pagination API
filter to insert RFC5988 compliant link headers
long entity count
pages are 1 based; show only relevant links

< 1 -> <treat as first page>
2   ->            next,last
3   -> first,     next,last
4   -> first,prev,next,last
5   -> first,prev,     last
6   -> first,prev
> 6 ->                 last
pagination for all resources (closes #33)