- Finalized packages for options 'qt' and 'qtgsi' for Windows and Linux. 
  With this the build on Windows with all possible options is completed.
- Changed the default for options to be equivalent to the traditional
  ROOT configure. They will be turned off is the required external is 
  not found.
- Reduced the verbosity of the cmake command the second time it is executed
  and has already found the external packages


git-svn-id: http://root.cern.ch/svn/root/trunk@39652 27541ba8-7e3a-0410-8455-c3a389f83636