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/js-yaml/lib/exception.js

@@ -0,0 +1,51 @@
+// YAML error class. http://stackoverflow.com/questions/8458984
+//
+'use strict'
+
+function formatError (exception, compact) {
+  let where = ''
+  const message = exception.reason || '(unknown reason)'
+
+  if (!exception.mark) return message
+
+  if (exception.mark.name) {
+    where += 'in "' + exception.mark.name + '" '
+  }
+
+  where += '(' + (exception.mark.line + 1) + ':' + (exception.mark.column + 1) + ')'
+
+  if (!compact && exception.mark.snippet) {
+    where += '\n\n' + exception.mark.snippet
+  }
+
+  return message + ' ' + where
+}
+
+function YAMLException (reason, mark) {
+  // Super constructor
+  Error.call(this)
+
+  this.name = 'YAMLException'
+  this.reason = reason
+  this.mark = mark
+  this.message = formatError(this, false)
+
+  // Include stack trace in error object
+  if (Error.captureStackTrace) {
+    // Chrome and NodeJS
+    Error.captureStackTrace(this, this.constructor)
+  } else {
+    // FF, IE 10+ and Safari 6+. Fallback for others
+    this.stack = (new Error()).stack || ''
+  }
+}
+
+// Inherit from Error
+YAMLException.prototype = Object.create(Error.prototype)
+YAMLException.prototype.constructor = YAMLException
+
+YAMLException.prototype.toString = function toString (compact) {
+  return this.name + ': ' + formatError(this, compact)
+}
+
+module.exports = YAMLException