* Settles all input promises such that they are guaranteed not to * be pending once the returned promise fulfills. The returned promise * will alw

* @returns {number} the value p within the range [0, 1], scaled to the range [low, high].

* @returns {width: (Number), height: (Number)} an object that describes the size of the browser's current view.

* @returns {Array} of wind colors and a method, indexFor, that maps wind magnitude to an index on the color scale.