Deb package creation script

This script makes a .deb package out of FreeCAD source. You need the checkinstall package installed. To use it, just:
 * edit the script and change manually the config lines if needed
 * copy it to your freecad source dir,
 * make it executable,
 * make sure your source will compile without errors (do a "make" first),
 * then run the script.

Note: this script has been made for Ubuntu Gusty, there might be slight differences in dependency packages names if you use another version of Ubuntu/Debian. If you have more info on this, please add it here...

For Ubuntu Hardy


 * remove libumfpack4 from dependencies (currently not used by FreeCAD)