revamped db schema and implemented some simple api

lib/utils/transforms.js

@@ -0,0 +1,23 @@
+function scrubIds(tuples) {
+  return tuples.map((t) => {
+    delete t.id;
+    return t;
+  });
+}
+
+function rewriteKeys(tuples, obj) {
+  return tuples.map((t) => {
+    Object.keys(obj).forEach((k) => {
+      if (k in t) {
+        t[obj[k]] = t[k];
+        delete t[k];
+      }
+    });
+  });
+}
+
+
+module.exports = {
+  scrubIds,
+  rewriteKeys
+};