updating coverage configuration (#7)

Author: ewhauser

.gitignore

@@ -1,5 +1,6 @@
 .eggs
 .idea
+.coverage
 .pytest_cache
 
 *.pyc

README.md

@@ -1,3 +1,6 @@
+[![Build Status](https://travis-ci.org/graphql-python/graphene-tornado.svg?branch=master)](https://travis-ci.org/graphql-python/graphene-tornado) 
+[![Coverage Status](https://coveralls.io/repos/github/graphql-python/graphene-tornado/badge.svg?branch=master)](https://coveralls.io/github/graphql-python/graphene-tornado?branch=master)
+
 # graphene-tornado
 
 A project for running [Graphene](http://graphene-python.org/) on top of [Tornado](http://www.tornadoweb.org/) in Python 2 and 3. The codebase is a port of [graphene-django](https://github.com/graphql-python/graphene-django).

requirements-test.txt

@@ -1,4 +1,5 @@
 coveralls==1.5.1
 mock==2.0.0
 pytest==3.10.0
+pytest-cov==2.6.0
 pytest-tornado==0.5.0