Replaces simplejson depedency for native json lib
Replaces characters that break CKAN JSON decoding
Bugfixes the geocoding feature + some refactoring

- now when the address can't be retrieved by 
geocoding, the user is prompted for the address
of a given point
Adds the CKAN to OST import feature:

- JSON to CSV methods
- OST Reception API calls
- Some refactoring and PEP8 code style