HEADS UP : This is based off rails 3.2 So, many gems upgraded for rails 4 might not play nice. I'll look into it when I can.
Instructions to run :
rake db:migrate
rails server -p
open localhost:/places
I didnot route it to root because that would not have made sense for integration.
IF you are using the app behind a proxy, configure it in config/initializers/geocoder.rb