add test for creating location from foursquare_hash
first steps to foursquare callout
add fetching venues from foursquare
implement foursquare querying
fix specs
Merge branch 'master' into foursquare-api

Conflicts:
	app/models/location.rb
	config/routes.rb
	db/schema.rb
Merge pull request #5 from leifg/foursquare-api

Implement access to Foursquare