Added ability to define effect arguments for the bootsequence

By adding a json object "args" to "bootsequence".

For example:


    "bootsequence" :
            {
                    "effect" : "Knight rider",
                    "duration_ms" : 5000,
                    "args" :
                    {
                            "color" : [0,255,0] ,
                            "fadeFactor" : 0.9 // "speed" is not set here. But effect engine uses the default values.
                    }
            }