title: Google Places API - can I save place_id?
body: <p>We develop a platform for building travel itineraries.
  The travel plan (=trip) is combined of places ordered by a user defined flow.
  We want to use Google Places API for searching places. We would like to store a place_id, and use it  for retrieving a trip info. The place_id will be used for fetching that place details from Google.
  A place_id will be saved for future use only if a user decided to include that place within his trip itinerary.</p>
  
  <p>Is it permitted according to the terms of use ?</p>
  
  <p>Thanks!
  Orit</p>