Update whatsprot.class.php

Correction of retrieve participant's jid
Merge pull request #85 from Amirjan/patch-12

Update whatsprot.class.php
Fire onDisconnect instead 'Socket closed' Exception
Merge pull request #86 from fermino/master

Fire onDisconnect instead 'Socket closed' Exception
Merge branch 'master' of https://github.com/mgp25/WhatsAPI-Official