Rename fletch -> dartino

src/vm/vector.cc

 // 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.
 
 #include "src/shared/assert.h"
 
 #include "src/vm/vector.h"
 
-namespace fletch {
+namespace dartino {
 
 uint8* DoubleSize(size_t capacity, uint8* backing) {
   uint8* new_backing = new uint8[capacity * 2];
   memcpy(new_backing, backing, capacity);
 #ifdef DEBUG
   memset(backing, 0xdd, capacity);
 #endif
   delete[] backing;
   return new_backing;
 }
 
-}  // namespace fletch
+}  // namespace dartino