Use this with diagnostics so that it can be changed as necessary
For example, sometimes want on stdout maybe or in a scroll window....
Let's replace this with pythong logging stuff.
at least get it to the point where "make quick" in swap/test works.
There is some wierd stuff here because TimBL and I couldn't
figure out how to share the chatty global across modules.
Surely Daniel K and DanC should be able figure that out.
|chatty_flag = 0|
file_list = 
print_all_file_names = 0
tracking = 0