Add ability to return custom error numbers in reponse about flask-jsonrpc

[nycholas]

Hello,

try:

from flask_jsonrpc.exceptions import Error

@jsonrpc.method('App.error')
def error():
    error = Error()
    error.data = {'erro1': 'message 1', 'erro2': 'message 2'}
    raise error

$ curl -i -X POST \
   -H "Content-Type: application/json; indent=4" \
   -d '{
    "jsonrpc": "2.0",
    "method": "App.error",
    "params": {},
    "id": "1"
}' http://localhost:5000/api
HTTP/1.0 200 OK
Content-Type: application/json
Content-Length: 194
Server: Werkzeug/0.10.4 Python/3.5.0
Date: Wed, 28 Oct 2015 12:26:31 GMT
{
  "error": {
    "code": 0,
    "data": {
      "erro1": "message 1",
      "erro2": "message 2"
    },
    "message": "Error: None",
    "name": "Error"
  },
  "id": "1",
  "jsonrpc": "2.0"
}

I will adding example in minimal.py[1].

Thank you!

[1] - https://github.com/cenobites/flask-jsonrpc/tree/master/examples/minimal

[zmingee]

That looks like exactly what I needed. Thank you!