User Activity v1.2 api call

[vsima]

• Add version param in method signature
• Implement the following json fields in UserHistory model obj:

{
     "start_city":{
        "latitude":37.7749295,
        "display_name":"San Francisco",
        "longitude":-122.4194155
     },
     "request_id":"37d57a99-2647-4114-9dd2-c43bccf4c30b",
     "currency_code":"USD"
}

[vsima]

@andela-asolomon You will need to implement the oauth2 authentication process in your app. Please see https://developer.uber.com/v1/auth/ to get started.