websocket url parsing made. In original version, device always tries to ...

webSocketServerUrl url parsing made. In original version, python api always tries to connect

to websocket at http://websocketdomain/device, ignoring given path

For example:
{
  "apiVersion": "1.2.0",
  "serverTimestamp": "2014-07-06T07:25:01.820136",
  "webSocketServerUrl": "ws://domain.com:8080/DeviceHiveJava/websocket"
}
api tries to connect to websocket at "ws://domain.com:8080/device" and not to "ws://domain.com:8080/DeviceHiveJava/websocket/device"

After fix it connects to http://websocketdomain/websocketpath/device correctly.