add coverage requirement and run test shell script

requirements.txt

@@ -6,3 +6,4 @@ djangorestframework
 django-rest-swagger
 celery
 gunicorn
+coverage

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