text: import * as d3 from './lib/d3.js'
  
  // event names
  riot.EVT = {
    updateInfobox: 'uib',
    hideInfobox: 'hib',
    clearResults: 'cr',
    hilight: 'h',
    unhilight: 'u'
  }
  
  // event bus
  riot.control = riot.observable()
  