added example usage
+""" flask_example.py
+
+ Required packages:
+ - flask
+ - folium
+
+ Usage:
+
+ Start the flask server by running:
+
+ $ python flask_example.py
+
+ And then head to http://127.0.0.1:5000/ in your browser to see the map displayed
+
+"""
from flask import Flask
import folium
