fix pagination after jquery 3.0 update

cache: false in $.ajax breaks the query string by adding _=timestamp

the url results in `page.com/category/2/slug&page=2?_=timestamp`

src/pagination.js

@@ -35,6 +35,8 @@ pagination.create = function(currentPage, pageCount, queryObj) {
 
 	queryObj = queryObj || {};
 
+	delete queryObj._;
+
 	var pages = pagesToShow.map(function(page) {
 		queryObj.page = page;
 		return {page: page, active: page === currentPage, qs: qs.stringify(queryObj)};