Moves largerapp into patterns dir and add test

- also adds this pattern into tox for testing

examples/patterns/largerapp/yourapplication/__init__.py

@@ -0,0 +1,4 @@
+from flask import Flask
+app = Flask(__name__)
+
+import yourapplication.views

examples/patterns/largerapp/yourapplication/views.py

@@ -0,0 +1,5 @@
+from yourapplication import app
+
+@app.route('/')
+def index():
+    return 'Hello World!'