dev-api: add developer portal, OpenAPI spec, and Flatenbadet case study

- New /developers/ page with API docs, SDKs, pricing, use cases
- OpenAPI 3.0 spec for Orders, Missions, Photos, Analytics
- Case study: Glasskiosken i Flatenbadet — complete ROI analysis
- Updated /order/ with recurring missions and frequency dropdown

services/frilans-payout/node_modules/object-inspect/test/undef.js

@@ -0,0 +1,12 @@
+var test = require('tape');
+var inspect = require('../');
+
+var obj = { a: 1, b: [3, 4, undefined, null], c: undefined, d: null };
+
+test('undef and null', function (t) {
+    t.plan(1);
+    t.equal(
+        inspect(obj),
+        '{ a: 1, b: [ 3, 4, undefined, null ], c: undefined, d: null }'
+    );
+});