Chaining the geocodeAddress and getWeather callbacks together

To get started we have to take our getWeather call and actually move it inside of the callback function for geocodeAddress. Because inside this callback function is the only place we have access to the latitude and longitude pairs.

Now if we open the geocode.js file, we can see that we get formatted_address back as the address property, we get the latitude back as latitude, and we get longitude back as longitude. We'll start wiring this up.