0.4.0

• The polling loop has been re-implemented to make it less blocking. This means that other devices, or Tradfri actions can be handled while polling the device status. This should improve overall (openLuup/AltUI) performance
• Add support for toggling the state (UPnP ToggleState command) for devices that support on/off
• Only refresh (sync) Tradfri devices when number of discovered devices is greater than zero. When devices are re-added, the device id changes, which breaks scenes and e.g. Reactor actions. This improvement should prevent the removal and later re-creation of new devices in case of temporary loss to or improper response from the Tradfri Gateway.