place/edit - Edits an existing place.

Method parameters:
id - The ID of the place to edit.
latitude - The new latitude of the place.
longitude - The new longitude of the place.
altitude - The new altitude of the place.
name - The new name of the place.
description - The new description of the place.
tags - A space-separated list of tags.

Returns a JSON document of the following format:
<boolean> - Always true.

Expected errors:
PLACE_NOT_FOUND - A place with the ID doesn't exist.
TOO_MANY_TAGS - More than 5 tags given.