Added Sphinx Based Documentation

Now have HTML based documentation generated using sphinx software.
Modified setup.py Based on New Documentation

Have changed the long description in setup.py to use a doc string instead of the
README.md file.  The doc string used reStructuredText format to link to the
documentation out on the web at pythonhosted.org/blogtool.
Made doc builddocs script

Simply changed bldcmd from a holder to an executable script with the proper
command line incantation for building the docs.
Mods to setup.py

Added the download_url to the setup information.

Also commits the now deleted doc/bldcmd, which has been replaced by
doc/builddocs.
Merge branch 'master' into dev

Brought in new HTML based documentation.
More Documentation Updates

Most notably, added the doc/source/changelog.rst for generating changelog
documentation.  Also made various minor presentation related changes to the
documentation, adding a blurb about the new `STDIN` file name support for
reading from the standard input.