Work toward Python 3.4 support and testing

Change-Id: I9914f98b935e81e3735309986aa7e7d7554b0113
fix small typo

Change-Id: Iac97581e59f6d9f46b43c4a4fc800313fb6cc1b0
Switch to using pbr's autodoc capability

Once we use the pbr based build to generate files, we prune
the indexes to remove references to code we would like to
hide like the common modules and private modules in conf.py.
We reuse the same excluded_patterns variable that is already
used in Sphinx and filter these modules from autoindex.rst

Change-Id: I777bdeaee5332a73ee39bc5bdc832bd0140724ce
Merge "Work toward Python 3.4 support and testing"
Merge "fix small typo"
Merge "Switch to using pbr's autodoc capability"