Changes of hpcdtoppm:

v0.2:

- Small workaround for strange behavior of address-calculation
  of a c-compiler for NeXT.

- Improved rounding for integer maths.

- Thrown out floating arithmetic, changed color conversion to
  integer fixed point.

- PPM-writing-routines added. You can choose whether you
  want to use pbmplus-routines or the included routines.

- some ununused variables thrown out.

