[new] dom4 lands in cdnjs [author] Andrea Giammarchi

A fully tested and covered polyfill for new DOM Level 4 entries:
  - Element#prepend()
  - Element#append()
  - Element#before()
  - Element#after()
  - Element#replace()
  - Element#remove()

Also a fix for most common DOM3 new entries such:
  - classList, fixed down to iOS 5 and IE8
  - CustomEvent, also fixed for all IE
  - Element#matches for all qsa capable browsers too
Merge pull request #3867 from WebReflection/master

[new] dom4 lands in cdnjs [author] Andrea Giammarchi