- replaced "-objscope" and "-nonleaf" by "-frame object|method|default" for nsf::alias and nsf::default - added functionality for "-frame method" to nsf::dispatch - made the order of argument in ::nsf::alias and method "alias" the same (always first the method, then "-frame ...") - extened regression test
- slots: * change name "initcmd" of "experimental slot features" to "defaultcmd" to avoid naming conflict the the initcmd executed at the initilization of a slot object (effects XOTcl as well) * make defaultcmd/valuecmd/valuechangedcmd working for nx (absence of trace method) * provide error message, when default/defaultcmd/valuecmd are used non-exclusively * make sure to init per-object slots after copy operations * make nx::Attribute.destroy more definsive * extend test cases