* harbour/contrib/Makefile
* respect HB_WITHOUT_ODBC and HB_WITHOUT_ADS envvars
* harbour/debian/control
* harbour/make_deb.sh
* removed libncurses5-dev, libslang2-dev, libgpmg1-dev, libx11-dev and
unixodbc-dev from dependences list.
+ added support for HB_COMMERCE=yes envvar
+ added automatic detection for curses, slang, gpm, x11 and odbc
devel packages
+ added test for ACESDK detection - it tests if ach.h file exists
in default user or system wide installation
The above modifications are not tested and I would like to ask
Debian/Ubuntu users to make necessary tests.