This is a basic python wrapper for channelflow, so far it only handles
basic operations on FlowFields, but maybe someday it will do 
more.   To build it you need to build channelflow with fPIC,
as is done in the script ../PIC-make-all.  Also swig-1.3 or
better is required. 

The example script, example.py, takes 3 arguments.  It's function
is to load the first two arguments as FlowField filenames, add them,
then save the result to the file specified by argument 3.