Geography data support

[stranne]

Add support for new functions.

• Stop areas
• Stop points
• Tariff zones
• Available from Västtrafik in 2017

New operations:

• GET /stopareas
• GET /stopareas/{id}
• GET /stopareas/{id}/tariffzones
• GET /stopareas/{id}/stoppoints
• GET /stoppoints
• GET /stoppoints/{id}
• GET /tariffzones
• GET /tariffzones/{id}