Create URL params for filters

[pauljickling]

After some extensive testing, I have determined that managing filters purely via React state is not a viable approach since data will be lost as soon as you proceed to the next page, and data from the pageContext object is a single direction data flow.

My proposed solution is instead of having the filters be buttons, where clicking them changes state, it makes more sense for them to be links to pages that use the URL params and queries to that can be used to map data onto the page. This will require some experimentation on my part in the interest of satisfying other requirements like issue #82 and #83