initWithCoder methods and encompasses entire loading to translate XIB 5 into older
XIB key processing. ALl this eventually should be cleaned up properly but done
this way in order to expedite the code push into svn for Testplant usage.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/branches/gnustep_testplant_branch@40300 72102866-910b-0410-8b05-ffd578937521