Io_lib is a library of file reading and writing code to provide a
general purpose trace file (and Experiment File) reading interface.
The programmer simply calls the (eg) read_reading to create a "Read"
C structure with the data loaded into memory. It has been compiled
and tested on a variety of unix systems, MacOS X and MS Windows.
Submitted by: Wen Heping <wenheping at gmail.com>