xotcl.h

- fixed namespace handling on stack for objects with namespaces (before, it was possible that a variable was created in an object's namespace without -objscope) - as a consequence, ListChildren() had to be adjused, since it depended on the previous namespace handling on the stack - fixed object sesolving in NsDotVarResolver() (before, it was possible that NsDotVarResolver could create variables in the wrong namespace) - simplified NsDotVarResolver() - more cleanup in name resolver * USE_DOT is gone * XOTclDotDotCmd() removed * improved performance of InterpCompiledDotVarResolver() * made LookupVarFromTable() obsolete and removed it * renamed DotVarResolver() and friends to ColonVarResolver() etc. - extended regression test