replace pinned.js with low-profile streaming implementation

scripts/tests/test-pins.js

@@ -0,0 +1,34 @@
+/*jshint esversion: 6 */
+const Pins = require("../../lib/pins");
+
+var stats = {
+    users: 0,
+    lines: 0,
+    pinned: 0,
+    events: 0,
+};
+
+Pins.list(function (err, pinned) {
+    for (var id in pinned) {
+        console.log(id);
+        stats.pinned++;
+    }
+    console.log(stats);
+}, {
+    pinPath: require("../../lib/load-config").pinPath
+});
+
+/*
+function (ref, safeKey, pinned) {
+    stats.users++;
+    stats.lines += ref.index;
+
+    Object.keys(ref.pins).forEach(function (id) {
+        if (!pinned[id]) {
+            pinned[id] = true;
+            stats.pinned++;
+        }
+    });
+    //console.log("pin", stats.events++);
+    //console.log(ref, safeKey);
+}*/