Now that we have a shared argparse definition for all reader related
options in the transport module, use that.
Change-Id: I12ca1a484a5d6e84820d9761c9701f8a94381f66
This adds sphinx based documentation generation. For now,
this manily renders some introduction and the autodoc-genreated
class/method reference from the source code for our libraries.
Actual user-level documentation for pySim-{prog,shell,read} remains
to be added separately
Change-Id: I52603e93c2c129a9e79687da6c534fa56a40a649