Fix build errors on Python 3.2

pylint depends on logilab-common; logilab-common==0.63.0 seems to have problems
with Python 3.2, so it is pinned to 0.62.1 (version before 0.63.0).
Merge pull request #257 from SoCo/py3.2

Fix build errors on Python 3.2
A few sphinx doc fixes