[TIP] tox config format

[Carl Meyer]

Hi Holger,

You asked for additional examples of repetitive tox.ini files; here's
mine: https://github.com/carljm/django-adminfiles/blob/master/tox.ini

It's pretty similar to Alex', just more so. The one additional factor
you'll see in it is the need to define a base set of dependencies and
then add to them in a specific env only (e.g. for pysqlite in py2.4)
without repeating the entire set.

(This tox.ini works great, of course, it's just repetitive. Thanks for
such a nice tool!)

Carl