Drop points for Microdata
Fix File API urls
Drop script execution events back to 1 point
Detect prefixed versions of :read-write and :read-only
Add a test for Promises

Based on
https://github.com/Modernizr/Modernizr/blob/master/feature-detects/es6/p
romises.js
Add a test for the new FileSystem API
Add a test for Web Components