Refactor API Schema and validation

- /schema now returns full openapi/swagger schema
- That schema is used to validate incoming requests
- And used as a contract in future integration tests
- Moved route files up one level
- Fixed incorrect 404 reponses when getting objects
- Fixed saving new objects and passing jsonschemavalidation

backend/app.js

@@ -52,7 +52,7 @@ app.use(function (req, res, next) {
 });
 
 app.use(require('./lib/express/jwt')());
-app.use('/', require('./routes/api/main'));
+app.use('/', require('./routes/main'));
 
 // production error handler
 // no stacktraces leaked to user