Add postal code and street to location

[ocram]

I think there could be no objections against adding the postal code and the street (both as optional fields) to the location object:

"location": {
    "type": "object",
    "properties": {
        "postalCode": {
            "type": "string",
            "description": "http://en.wikipedia.org/wiki/Postal_code"
        },
        "street": {
            "type": "string"
        }
    }
}

[danvideo]

thanks mwaclawek, that's what I was thinking in #76, but condensed a bit too much together

[ocram]

Has been implemented: #110