Just run 'make' in zidrav dir. Then copy 'zidrav' file to some place in your 
$PATH (usually /usr/local/bin). You might want to copy man page (zidrav.1)
to some place where your man will find it.

If you want to use zidrav on a BIG ENDIAN machine (for example PPC) you need
to edit core.cpp before running 'make'. At the beginning of the file there is
a line that looks like this:
//#define CPU_BIGENDIAN
You need to remove "//" from this line so it look like this:
#define CPU_BIGENDIAN

