Update project authors statements to Dartino

pkg/raspberry_pi/lib/raspberry_pi.dart

-// Copyright (c) 2015, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2015, the Dartino project authors. Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE.md file.
 
 /// Access to Raspberry Pi 2 specific hardware features such as onboard LEDs.
 /// Also provides an API to the Sense HAT shield.
 ///
 /// The class [RaspberryPi] provide access to the Raspberry Pi features.
 ///
 /// Usage
 /// -----
@@ skipping 384 matching lines @@
   void setMode(OnboardLEDMode mode) {
     _leds._setMode(_led, mode);
   }
 
   /// Turn on the LED.
   void on() => _leds._setBrightness(_led, true);
 
   /// Turn off the LED.
   void off() => _leds._setBrightness(_led, false);
 }