A suite to read in su data to python and to write it out to python format

Creator: Joeri Brackenhoff (J.A.Brackenhoff@tudelft.nl)
Addtional contributions by: Johno van IJsseldijk (J.E.vanIJsseldijk@tudelft.nl)

The suite creates a class that contains all of the header attributes and can be used in a variety of ways. The main functions are:
readsu - for reading in the amplitudes of the data and the headers
readsuamp - for only reading in the amplitudes of the data
readsuhdr - for only reading in the headers of the data
writesu - for writing out into SU format
makehdr - for creating a header object and setting the most important header info
plotsu - a simple plotting command for the data