What is a community? A group living in the same area? Yes, but more. A group sharing similar interests? Yes, but more A group sharing similar concerns? Yes, but more. A group sharing friendships? Yes, and when you add all of these attributes of a community you have the Highland Communities Initiative (HCI), a project of  The Trustees of Reservations. Last Sunday members of many communities gathered to celebrate the opening of the Bullitt Reservation, the newest of…