Merge pull request #65 from marketboomer/ratjens

replace awesome_nested_set with closure_tree
Remove duplicate declarations in CSS and JS
Merge pull request #66 from marketboomer/stable_danny

Remove duplicate declarations in CSS and JS
Merge branch 'master' of https://github.com/marketboomer/nunchaku into current
Merge branch 'refs/heads/master' into ratjens
Merge branch 'refs/heads/current' into ratjens