Add a script to run unit tests in a virtualenv

.gitignore

@@ -1,3 +1,4 @@
 local_settings.py
 *.pyc
 *.swp
+virtualenv

run-unit-tests.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+if [ ! -f virtualenv/bin/activate ];then
+  virtualenv --no-site-packages virtualenv/
+fi
+source virtualenv/bin/activate
+pip install -r pip-requirements
+exec ./manage.py test $@