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/json-stable-stringify-without-jsonify/test/to-json.js

@@ -0,0 +1,20 @@
+var test = require('tape');
+var stringify = require('../');
+
+test('toJSON function', function (t) {
+    t.plan(1);
+    var obj = { one: 1, two: 2, toJSON: function() { return { one: 1 }; } };
+    t.equal(stringify(obj), '{"one":1}' );
+});
+
+test('toJSON returns string', function (t) {
+	t.plan(1);
+	var obj = { one: 1, two: 2, toJSON: function() { return 'one'; } };
+	t.equal(stringify(obj), '"one"');
+});
+
+test('toJSON returns array', function (t) {
+	t.plan(1);
+	var obj = { one: 1, two: 2, toJSON: function() { return ['one']; } };
+	t.equal(stringify(obj), '["one"]');
+});