code: function (key) {
                  var a = this.all(), r = []
                  // FIXME this is crazy inefficient but I'm in a strata meeting and half concentrating
                  for (var i = 0, l = a.length; i < l; i++) {
                      if (a[i] != key) r.push(a[i])
                  }
                  storage.setItem(JSON.stringify(this.key), JSON.stringify(r))
              }
docs: deletes a key from the index