Update connect.php

Wrong $response['content'] variable
Update tavernaSender.php

Add check OK also when returned code 202 (maybe due to Taverna server version 2.5.4)
Update tavernaSender.php

Add option to pass public cert for HTTPS connection to soap server with self-signed certificate. Public certificate have to be added to microservice_users.xml after serviceURI: 
<user username = "soapUser" password="soapPass" serviceUri="http://serverURL/soap_server/" trustCA="
MIID7zCCAtegA...">
  </user>
Merge pull request #14 from giancarlobi/taverna-1.x

Patch for Taverna server 2.5.4 and self-signed certificate of soap server HTTPS