Add code coverage to unit testing

.gitignore

@@ -2,3 +2,4 @@ local_settings.py
 *.pyc
 *.swp
 virtualenv
+.coverage

pip-requirements

@@ -6,3 +6,4 @@ django-mptt==0.5.2
 django_messages==0.4.4
 south==0.7.3
 django-piston==0.2.2
+coverage

run-unit-tests.sh

@@ -4,4 +4,9 @@ if [ ! -f virtualenv/bin/activate ];then
 fi
 source virtualenv/bin/activate
 pip install -r pip-requirements
-exec ./manage.py test $@
+coverage run ./manage.py test $@
+ret=$?
+if [ $ret -eq 0 ];then
+    coverage report -m --include=\*
+fi
+exit $ret