Add Pagination to RetroHunt

[davidcbbc]

Hello!

Currently retrohunt searches all the data for a given match. Since there is no backend pagination of the findings, it will take more and more time as we add more data into the framework. This is not scalable. Therefore, I suggest implementing pagination of the retrohunt findings, thus only gathering i.e. 5 results at a time.

Let me know if this could be useful :)

[bitsnaps]

This #278 should fix it.