Replaced inline if else for 2.4 compatibility.
Used six.b function for 2.4 compatibility.
Included qr.1 to prevent copy failure.
Added a tox.ini case for py24.
Switched to traditional if/else syntax.
Merge pull request #36 from tcely/compat/python-2.4

Fixes for python 2.4 compatibility
Fix tox.ini to work with latest tox version

We're actually going to only test against Python 2.5 rather than 2.4
(which is no longer supported by tox/virtualenv).

Also add basic testing documentation.