Fix updating the uses (#6)

* update the usescsv db row when uses change
* add a created column for visual aid of the created links
* allow decrease uses

static/js/index.js

@@ -43,6 +43,12 @@ new Vue({
             label: 'Wait',
             field: 'wait_time'
           },
+          {
+            name: 'uses',
+            align: 'right',
+            label: 'Created',
+            field: 'uses'
+          },
           {
             name: 'uses_left',
             align: 'right',