Use standard result field in data and error objects returned from an express application
The API consists of 2 functions:
- 
sendJSONResult(res, data) which sends an object of the format: { result : 'ok', data_field_1 : data_field_1_value, ...} back via res.send 
- 
sendJSONError(res, err, msg) which sends and object of the format: { result : 'error', msg : msg, err : err } via res.send 
Apache 2.0