Adding to Object.man: cget, configure, move, copy, ...
nsf.c:
- invalidate paramter caches of subclasses on
  NsfParameterInvalidateClassCacheCmd unless during
  shutdown. Otherwise some classes might not become aware of
  properties added later to superclasses.
- extended regression test
Merge branch 'master' of ssh://alice.wu-wien.ac.at/usr/local/src/git-repo/nsf