This tool can:
  - screenscrape the commodities trading screen
  - produce the results as a tab separated values file
  - **TODO** upload the results to PCTB

To run it, change to this directory, type `make', and then:
  ./ypp-commodities >commods.csv

It may put up a window asking about characters it does not understand.
It is important to get these inputs right or it may misrecognise
things in future.  **TODO** write actual useful instructuions to cover the
subtleties.  The results are stored in the file `charset-15.txt'.

If you need to report a bug, please be sure to remember the exact
error message and circumstances.  Also, for recognition problems there
will probably be a very useful screenshot file called `#pages#.pnm'.
This is likely to be very large so don't just email it to me, but if
you can put it up on a webpage for me to download that will help.