Now runs under Windows.

The code has been changed slightly so that it compiles (and works) under Windows too. Previoulsy it compiled okay, but some small changes were needed, mainly related to reading binary files in and out. I'm grateful for the help of Randall DuCharme AD5GB for his help with some of that.

The code has been put onto CVS. This is completley new to me and Randall, so some problems are likely to occur.