Support city_name,lon,lat search, add available fields
Change default format to json for root_path
Add User manual
Add gem `geocoder`
Merge branch 'feature/support_geocoder' into develop
Merge branch 'release/v1.4'

Conflicts:
	app/controllers/weather_logs_controller.rb
	config/routes.rb
Merge branch 'master' of github.com:poc7667/parse_weather_sample