stable version

no more freezes and quick reactivity, no bug after 2 days of quasi
continuous testing
only thing left, some files loop endlessly in EOF state, though
btnFile.available() is 0 and inibSDReading is true. No real clue what is
happening as going through EOF case should happen only once by
construction.

fastLed.ino

@@ -71,7 +71,6 @@ void updateLeds(){
   FillLEDsFromPaletteColors(tableLeds,NUM_LEDS_TABLE, table_currentPalette, 0);
 
   table_currentBrightness = FadingBrightness( 1, table_currentBrightness, table_targetBrightness ,table_stepBrightness);
-  Serial.println(table_currentBrightness);
 }