Update README.md
New WHATSAPP_VER , WHATSAPP_TOKEN , WHATSAPP_USER_AGENT

This agent and token works with the latest version of whatsapp client
Merge pull request #438 from manufuentescr/patch-3

New WHATSAPP_VER , WHATSAPP_TOKEN , WHATSAPP_USER_AGENT
Fixes #437
Handle status == ok on codeRequest response.

It looks like the response for codeRequest can say it is ok and
don't need to send the code on a sms. If so, fire a onCodeRegister
event with the password included on the reponse.
Merge pull request #441 from pastoso/master

Handle status == ok on codeRequest response.