Nota 731

Fix for IE11 on Win8 and updates and fixes for @mzedeler QUnit tests.

Also fixes a few other issues:
- Image preloading was broken, loaded all images and caused multiple requests per image on certain browsers.
- Unwanted tags (link, script and style) were removed in an insecure way, initialized html to DOM and then removed the elements.
This (no pun intended :-) ) is against our style guide (using a bare `@` in stead of `this`).