update readme (#8)

Author: ewhauser

README.md

@@ -5,6 +5,47 @@
 
 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).
 
-# Examples
+# Getting started
 
-See the [example](examples/example.py) application for an example on how to create GraphQL handlers in a Tornado project.
+Create a Tornado application and add the GraphQL handlers:
+
+```python
+import tornado.web
+from tornado.ioloop import IOLoop
+
+from graphene_tornado.schema import schema
+from graphene_tornado.tornado_graphql_handler import TornadoGraphQLHandler
+
+
+class ExampleApplication(tornado.web.Application):
+
+    def __init__(self):
+        handlers = [
+            (r'/graphql', TornadoGraphQLHandler, dict(graphiql=True, schema=schema)),
+            (r'/graphql/batch', TornadoGraphQLHandler, dict(graphiql=True, schema=schema, batch=True)),
+            (r'/graphql/graphiql', TornadoGraphQLHandler, dict(graphiql=True, schema=schema))
+        ]
+        tornado.web.Application.__init__(self, handlers)
+
+if __name__ == '__main__':
+    app = ExampleApplication()
+    app.listen(5000)
+    IOLoop.instance().start()
+```
+
+When writing your resolvers, decorate them with either Tornado's `@coroutine` decorator for Python 2.7:
+
+```python
+@gen.coroutine
+def resolve_foo(self, info):
+  foo = yield db.get_foo()
+  raise Return(foo)
+```
+
+Or use the `async` / `await` pattern in Python 3:
+
+```python
+async def resolve_foo(self, info):
+  foo = await db.get_foo()
+  return foo
+```