duplicate this code in the frisbee tree, build a version suitable for
linking in with frisbee. I also modified the FrisbeeRead interface to
pass back pointers instead of copying the data. There is no real
performance benefit that I noticed, but it made me feel better not to
copy 350 MBs of data another time. There is new initialization
function that is called by the frisbee main program to set up a few
things.