create initial project

The specs directory has materials provide to me by customer.

The code directory will contain the code written.

The original CDownload.cls file is treated specially.
A pristine copy is kept in the specs directory.
A renamed copy is also placed into the code directory.
I have a general idea to annotate this file so that it can be combined
with the new download.c file with the two files displayed side by side in a pdf
file for documentation.