Add catchment area management
Add telephone number to customer
Translate street name and street number to German

Fixes #102
Do not authorize users which didn't provide a correct password
Add rails_12factor gem Heroku complained about
Fix database disconnect after deploy
Fix a few labels
Show current offerings on offerings index page
Add icon fonts for up and down buttons on tour page
Replace "Löschen" text with trash icon from icon font
Fill out customer's details page
Order customers by surname
Fix specs
Add order_id to stations API response