Fix error when use scrollFn

[Fix] missing semicolon in README

ge branch 'virtualidentityag-master'

Update README.md

I thought this would be useful.

Update Sortable.js

In some cases `el.host` is the current host name

Handles inside polymer elements

IE-11 pointer events

IE-11 supports css pointer-events incorrect:
if your draggable elem contains pseudoelements,
Sortable.js will solve that your draggable elem
are dropping to itself.
So Sortable.js will place your draggable elem to end of list.

This PR let to Sortable.js solve that IE11 doesnt support pointer-events