Yelp API for reviews and ratings

[alannarisse]

We should tie into the Yelp API for:

1. reviews
2. ratings
3. images

https://www.yelp.com/developers

[christophergoot]

I used Yelp for my API capstone, and had to use a proxy to access it (don't tell).
I would suggest Google Places API instead. Data may not be as robust locally, but they allow access, and it will scale substantially better than Yelp if/once the App outgrows Portland