To compile archtoi

1. Get the latest release, preferably a tagged release
2. You need the cfitsio library. Set the CFITSIODIR environment variable
   to the location of the library (the directory should contain fitsio.h
   and libcfitsio.a
3. run the 'mkd' script
4. run make

if you want to build a statically-linked version, run
make NOSHLIB=Y