* enhanced reachability monitor to handle: WiFi access point change, IP address change, interface change and generate for them all "connection down -> connection up" event, so library will reinitialize components which rely on data routes
* fixed presence disabling and unsubscribe (small issues)
* added additional class which simplifies access to: network address, WLAN SSID and BSSID
* reachability monitor now is able to provide more information about network using new class and print it all into console