PEP-8 in setup.py
Pin to ReportLab < 3.0 on Python 2.6

Some say we ought to drop Python 2.6 compat at all.  I don't mind, but I
don't want to be the one who does that and has to face any hypothetical
angry mobs as a result.
Add a tox.ini and a MANIFEST.in
tox tells me this package also works on 2.6, 3.2 and 3.3