- nx.tcl: * added protected and public for "require method" The following forms are now valid "... require public method" "... require protected method" "... require method" "... require public class method" "... require protected class method" "... require class method" * extended regression test
- nx.tcl: implemented copy without a provided name. If argument of copy is omitted, the copied object is created with a fresh name (i.e. created with the method "new"). Example set x [o copy] - extended regression test