Merge pull request microsoft#9 from JuhiB/jb-docu-sample-vscode-flask-tutorial

Added documentation to __init__.py

Author: kraigb

hello_app/__init__.py

@@ -1,2 +1,2 @@
-from flask import Flask
-app = Flask(__name__)
+from flask import Flask  # Import the Flask class
+app = Flask(__name__)    # Create an instance of the class for our use