Added Version Checking for ES6
Added Version Checking for ES6

couchbaselabs/devguide-examples,couchbaselabs/devguide-examples,couchbaselabs/devguide-examples,couchbaselabs/devguide-examples,couchbaselabs/devguide-examples,couchbaselabs/devguide-examples,couchbaselabs/devguide-examples,couchbaselabs/devguide-examples,couchbaselabs/devguide-examples