include virtualenv in the test dependencies

Author: dhellmann

tox.ini

@@ -3,9 +3,11 @@ envlist = py32,py27,py26
 
 [testenv]
 commands = bash ./tests/run_tests {envdir} []
+deps = virtualenv
 
 # Not sure why this is needed, but on my system if it isn't included then
 # the python version picked up for 2.6 is actually 2.7.
 # IF THIS CAUSES YOU A PROBLEM COMMENT IT OUT BEFORE RUNNING THE TESTS.
-#[testenv:py26]
+[testenv:py26]
 #basepython=/Library/Frameworks/Python.framework/Versions/2.6/bin/python2.6
+basepython=python2.6