Implement POST /locations/:id/parked and POST /locations/:id/unparked endpoints.
Update models to show guarded attributes.
Merge branch 'develop' of https://github.com/kzima/parkme.at into develop

# By Krzysztof Zima
# Via Krzysztof Zima
* 'develop' of https://github.com/kzima/parkme.at:
  added filtering by price and distance
  added current location service
  - locations page - improved the spacing on filters
  added location and complete page
  added routes, controllers and markup for home and list page. Also fixed gulp to handle sass errors.
  renamed app name to "parkme"