jquery core: closes #2811, $.fn.add now calls $.unique internally, also it was failing for array-like f.e: window.
jquery core: closes #2811, $.fn.add now calls $.unique internally, also it was failing for array-like f.e: window.

git-svn-id: a6f3e0ffc78e78789c45711e92f8046af3fcb362@5503 c715fcbe-d12f-0410-84c4-316a508785bb

dantman/4query,dantman/4query