PTC change history

PTC 0.73 (final) (23/7/99)
-final release with bugfixes
-changed the license to GNU LGPL

PTC 0.72 (26/4/98)
-released as open source under the GNU GPL
-added fakemode support (truecolor emulation) to linux svgalib
-fixed process priority bug in win32 GDI output
-added linux svgalib support (thanks to Kevin Moule!)
