create all docs before calling back

resolves nightscout#423

lib/entries.js

@@ -96,21 +96,22 @@ function storage(name, storage, pushover) {
 
   // store new documents using the storage mechanism
   function create (docs, fn) {
-      with_collection(function(err, collection) {
-        if (err) { fn(err); return; }
-        // potentially a batch insert
-        var firstErr = null,
-            totalCreated = 0;
-
-        docs.forEach(function(doc) {
-            collection.update(doc, doc, {upsert: true}, function (err, created) {
-                firstErr = firstErr || err;
-                totalCreated += created;
-            });
-            sendPushover(doc);
+    with_collection(function(err, collection) {
+      if (err) { fn(err); return; }
+      // potentially a batch insert
+      var firstErr = null,
+          totalCreated = 0;
+
+      docs.forEach(function(doc) {
+        collection.update(doc, doc, {upsert: true}, function (err, created) {
+          firstErr = firstErr || err;
+          if (++totalCreated >= docs.length) {
+            fn(firstErr, totalCreated, docs);
+          }
         });
-        fn(firstErr, totalCreated, docs);
+        sendPushover(doc);
       });
+    });
   }
 
   //currently the Android upload will send the last MBG over and over, make sure we get a single notification