gentclAPI.tcl: - handle duplicated domains by folding these to a single definition nsf.c: - added command nsf::method::get. Rationale: provide a central place to obtain information about all kind of method handles, which might be - scripted and c-based methods - nsf::procs - plain tcl procs - cmds (with and without paramter definitions) - make results of ListMethod() robust against missing information (e.g. plain tcl cmds, missing object registrations, etc.) - factor out common code for ListMethod call sites for per-object methods, instance methods and procs/cmds to ListMethodResolve() - return errors from failing converter registrations - extend regression test (new test set nsf-method.test)