add tooltip sample
Fixed crash in scrollIntoView() when parent is `window`
Improve assert message text
CDN support

//cdn.jsdelivr.net/jquery.fancytree/2/jquery.fancytree-all.min.js

Close #308
New method nodeCreateNode (ext-edit)

Update #299
Merge branch 'master' of https://github.com/mar10/fancytree

Conflicts:
	CHANGELOG.md