minor clean up to lazy load example so it is clear
minor clean up to lazy load example so it is clear

remove esriLoader.require() as it's not used and could cause confusion
disable button after JSAPI loads (so don't load it again)
update Esri CSS to 3.14
minor formatting

Esri/angular-esri-map,minggangshao/angular-esri-map,fgpv-vpgf/doc-site-sample,Kollibri/angular-esri-map,walnuthe/angular-esri-map,fgpv-vpgf/doc-site-sample,tomwayson/angular-esri-map,walnuthe/angular-esri-map,tomwayson/angular-esri-map,Esri/angular-esri-map,minggangshao/angular-esri-map,Kollibri/angular-esri-map,walnuthe/angular-esri-map,minggangshao/angular-esri-map,tomwayson/angular-esri-map,Kollibri/angular-esri-map,Esri/angular-esri-map