Generic updates

[hreintke]

@alon24 :
This PR is to show you my work in progress. Not at all complete and nicely implemented.
And, as I just noticed, also a number of unwanted updates.
Probably caused by my rusty knowledge of the android studio but I am catching up.

If you want to use the json commands, take the Command_Object branch from SmingRTOS and take a look in the CommandProcessing.md (readme).

In your application you then can do : server.commandProcessing(true,"command","drive");

Then all your websocket messages will be directed to the commandFunction defined for the "drive command"

And processing can be done by :

void processAppCommands(Command inputCommand, CommandOutput* commandOutput)
{
    commandOutput->printf("App : %s\r\n",inputCommand.getCmdString().c_str());

    JsonObject & jsonCommand = inputCommand.getRoot();
    if  (jsonCommand.success())
    {
        if (jsonCommand.containsKey("JSTK"))
        {
            int x = jsonCommand["JSTK"][0];
            int y = jsonCommand["JSTK"][1];
            Serial.printf("JSTK = %d, %d, ",x,y);
        }
        if (jsonCommand.containsKey("BAR"))
        {
            int x = jsonCommand["BAR"][0];
            int y = jsonCommand["BAR"][1];
            Serial.printf("BAR = %d, %d, ",x,y);
        }
        if (jsonCommand.containsKey("BTN"))
        {
            int x = jsonCommand["BTN"][0];
            int y = jsonCommand["BTN"][1];
            Serial.printf("BTN = %d, %d, ",x,y);
        }
        Serial.printf("\r\n");
    }
    else
    {
        Serial.printf("App debug : %s\r\n",inputCommand.getCmdString().c_str() );
    }
}