* harbour/ChangeLog
! fixed typo in date
* harbour/doc/gtapi.txt
* harbour/include/hbgtcore.h
* harbour/source/rtl/hbgtcore.c
* harbour/source/rtl/gtgui/gtdef.c
* changed HB_GT_DEFAULT_<name> to HB_GT_<name>_DEFAULT and added
REQUEST posibilities so now the GT drivers can be REQUESTed and
the default one set in similar way.
F.e.:
REQUEST HB_GT_WIN
REQUEST HB_GT_WVT_DEFAULT
REQUEST HB_GT_STD
I think that it will be much easier and also using _DEFAULT as suffix
does not resolve fully 10 character symbol but will work if GT name
is not longer then 3 characters
