Add support for window.addEventListener
Merge pull request #63 from arv/window-add-event-listener

Add support for window.addEventListener
Restructure wrappers a bit to simplify the code

This also fixes #65

Now all wrappers are hanging of scope.wrappers.
Merge pull request #73 from arv/restructure-wrappers

Restructure wrappers a bit to simplify the code
Merge branch 'master' of github.com:toolkitchen/ShadowDOM
factor test guts into test.main.js, referenced from *.html test runners, add missing window test and gruntfile dependency
repair factoring of test scripts