added .env to gitignore file
added dotenv to gemfile
added .buildpacks and .vendor_urls to root directory
added rgeo and rgeo-geojson to gemfile
changed database.yml to postgis and added line to application.rb
added pry and pry-rails to gemfile
added procfile, unicorn, rails_12factor
Merge branch 'master' into heroku_setup
Merge pull request #2 from nickmeehan/heroku_setup

Heroku setup