Update project authors statements to Dartino

pkg/stm32f746g_disco/lib/gpio.dart

-// Copyright (c) 2016, the Fletch project authors. Please see the AUTHORS file
+// Copyright (c) 2016, 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.
 
 library stm32f746g.gpio;
 
 import 'dart:fletch.ffi';
 
 import 'package:stm32f746g_disco/src/stm32f7_constants.dart';
 import 'package:stm32f746g_disco/src/stm32f7_peripherals.dart';
 
@@ skipping 235 matching lines @@
     temp |= (((mode & GPIO_OUTPUT_TYPE) >> 4) << p.pin);
     peripherals.setUint32(base + OTYPER, temp);
 
     // Activate the pull-up/pull-down resistor (GPIOx->PUPDR).
     temp = peripherals.getUint32(base + PUPDR);
     temp &= ~(GPIO_PUPDR_PUPDR0 << (p.pin * 2));
     temp |= (pull << (p.pin * 2));
     peripherals.setUint32(base + PUPDR, temp);
   }
 }