CSV import as a table and db connection rework

- Add csv to existing db #32
- [RFE] Simplify working with temporary tables #53

src/lib/utils/time.js

@@ -3,5 +3,13 @@ export default {
     const diff = end.getTime() - start.getTime()
     const seconds = diff / 1000
     return seconds.toFixed(3) + 's'
+  },
+
+  debounce (func, ms) {
+    let timeout
+    return function () {
+      clearTimeout(timeout)
+      timeout = setTimeout(() => func.apply(this, arguments), ms)
+    }
   }
 }