initial commit
precompiled assets - public/assets/manifest*.json tells Heroku not to compile assets
buildpacks for Heroku, sets up correct paths for rgeo dependencies
added gems: rgeo, rgeo-geojson, rgeo-shapefile, dbf + activerecord-postgis-adapter
configured active record post his adapter (*database.yml overwritten by Heroku on build)
added gems: pry + pry-rails
added gem: Unicorn; added Procfile + configuration for Unicorn server