Post base class missing fields that facebook may send for any post type

The Post subclasses have fields that are actually available from facebook for generic Post types.
For example, any post type may have a Page representing a Place:
CheckinPost does have getPlace(), but other Post types are allowed to have a location.
PhotoPost has a mapping for object_id to getPhotoId(), but other post types may have an object_id that corresponds to a photo object.

eg:
http://developers.facebook.com/tools/explorer/?method=GET&path=100003283444808_195829197203194
is "type": "status",
but has "place":

{...}

I believe it would be useful to collapse all the Post subclasses into Post itself.

–
probably worth a shiny new bug: looks like the Post with_tags element is not picked up by any Post field.

"with_tags": {
"data": [

{ "name": "SeenuInq Upadhya", "id": "100002151518236" }

...
]
Likewise, the "tags" element is not documented in the Facebook apis on Post. I suspect you are using the Photo tag logic, rather than a new Mixin thing for the element tag.