- use property "doc(title)" throughout oacs-5-8 instead of "title" to get rid of warnings in error.log of the form:
     Warning: /forums/message-view has no doc(title) set.
  Using doc(title) is required in blank-master.tcl but was used so far only in a few packages
- new function ::xo::getObjectProperty to abstract from xotcl and nx
- make use of new function at several places