code: function GeoStore(config){
  
      if(!config.store || !config.index){
        throw new Error("Terraformer.GeoStore requires an instace of a Terraformer.Store and a instance of Terraformer.RTree");
      }
      this.index = config.index;
      this.store = config.store;
      this._stream = null;
  
      this._additional_indexes = [ ];
    }
docs: The store object that ties everything together... /* OPTIONS
  {
  store: Terraformer.Store.Memory,
  index: Terraformer.RTree
  }