newfeatures:
    1) Support for external sources of coordinates is added
    2) Ability to choose the level of diagnostic messages is added
    3) Support for transfer archive between two hubs is added
    4) Global variable WIFI_RSSI (received signal strength indication) is available in EasyLogic
    5) Global variable WIFI_CLIENT_CONNECTED (the status shows if client is connected) is available in EasyLogic
corrections:
annotations:
Revision 4
