fix(rangeSlider): refinements cleanuo
fix(rangeSlider): refinements cleanuo

Do not add the numeric refinements if the values are equal to min/max to
cleanup the state+URL. Fix #147

algolia/react-instantsearch,algolia/instantsearch.js,algolia/react-instantsearch,algolia/instantsearch.js,algolia/react-instantsearch,algolia/instantsearch.js,algolia/react-instantsearch