Create working demo (#5)

* Add docs example and update demo source code

* Fail with debug

* Fix tests

* Update sql scripts

* Update docs

* Add checking for the password

* Update documentation with launch/usage example

* Launch flake8 instead of pep8 and pyflakes

tests/test_cookies_identity.py

@@ -34,7 +34,7 @@ def test_remember(create_app_and_client):
     app.router.add_route('GET', '/', handler)
     resp = yield from client.get('/')
     assert 200 == resp.status
-    assert 'Andrew' == client.cookies['AIOHTTP_SECURITY'].value
+    assert 'Andrew' == resp.cookies['AIOHTTP_SECURITY'].value
     yield from resp.release()
 
 
@@ -98,5 +98,6 @@ def test_forget(create_app_and_client):
     resp = yield from client.post('/logout')
     assert 200 == resp.status
     assert resp.url.endswith('/')
-    assert '' == client.cookies['AIOHTTP_SECURITY'].value
+    with pytest.raises(KeyError):
+        _ = client.cookies['AIOHTTP_SECURITY']  # noqa
     yield from resp.release()