add coverage requirement and run test shell script

tools/runserver.sh

@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+python manage.py runserver

tools/runtest.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+coverage run --source='.' manage.py test
+nose html
+open htmlcov/index.html