0026229: Add the possibility in OCAF to open/save a document from/to a stream object
Open and SaveAs methods of TDocStd_Application use standard iostreams for XmlOcaf format
Conflicts:
src/BinDrivers/BinDrivers_DocumentStorageDriver.cxx
src/BinLDrivers/BinLDrivers_DocumentRetrievalDriver.cxx
src/BinLDrivers/BinLDrivers_DocumentStorageDriver.cxx
src/CDF/CDF_Application.cxx
src/CDF/CDF_FWOSDriver.cdl
src/CDF/CDF_FWOSDriver.cxx
src/DDF/DDF_IOStream.cxx
src/DDF/DDF_IOStream.hxx
src/FSD/FSD_CmpFile.cxx
src/PCDM/PCDM_ReadWriter.cdl
src/PCDM/PCDM_ReadWriter.cxx
src/PCDM/PCDM_ReadWriter_1.cdl
src/PCDM/PCDM_ReadWriter_1.cxx
src/PCDM/PCDM_Reader.cdl
src/PCDM/PCDM_RetrievalDriver.cdl
src/PCDM/PCDM_RetrievalDriver.cxx
src/Standard/FILES
src/TDocStd/TDocStd_Application.cxx
src/UTL/UTL.cxx
src/XmlLDrivers/XmlLDrivers_DocumentStorageDriver.cxx