Add support for Labeled Places.json format

Saved Places format:

```json
{'geometry': {'coordinates': [...], 'type': 'Point'},
 'properties': {'Google Maps URL': '...',
  'Location': {'Address': '...',
   'Business Name': '...',
   'Country Code': 'US',
   'Geo Coordinates': {'Latitude': '...', 'Longitude': '...'}},
  'Published': '2018-05-02T01:46:02Z',
  'Title': '...',
  'Updated': '2018-05-02T01:46:02Z'},
 'type': 'Feature'}
```

Labeled Places format:

```json
{'geometry': {'coordinates': [...], 'type': 'Point'},
 'properties': {'address': '...',
  'name': 'Home'},
 'type': 'Feature'}
```

json2kml.py

@@ -33,17 +33,28 @@
 count = 0
 for place in data["features"]:
     if place["type"] == "Feature":
-        name = html.escape(place["properties"]["Title"])
+        try:
+            name = html.escape(place["properties"]["Title"])
+        except KeyError:
+            name = html.escape(place["properties"]["name"])
         print(f'Parsing place "{name}"')
 
-        placeLocation = place["properties"]["Location"]
         lon = place["geometry"]["coordinates"][0]
         lat = place["geometry"]["coordinates"][1]
 
-        if "Address" in placeLocation:
-            address = html.escape(placeLocation["Address"])
-        else:
-            address = None
+        try:
+            placeLocation = place["properties"]["Location"]
+
+            if "Address" in placeLocation:
+                address = html.escape(placeLocation["Address"])
+            else:
+                address = None
+
+        except KeyError:
+            if 'address' in place['properties']:
+                address = html.escape(place['properties']['address'])
+            else:
+                address = None
 
         kml.newpoint(name=name, coords=[(lon, lat)], address=address)
         count += 1