code: function getAcadYear(date) {
    var years = Object.keys(acadYearStartDates);
    years.sort().reverse();
  
    for (var i = 0; i < years.length; i += 1) {
      var year = years[i];
      if (date >= acadYearStartDates[year]) {
        return {
          year: year,
          startDate: acadYearStartDates[year]
        };
      }
    }
    return null;
  }
docs: Computes the current acad year and return an object of acad year and start date for that year.
  If the date is too far into the future (not within supported range),
  the last-supported academic year is returned.
  If the date is too early (not within supported range), null is returned.
  @param  {Date} date
  @return {Object} acadYearObject - { year: "15/16", startDate: Date }