Rename fletch -> dartino

src/vm/refcounted.h

 // 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.
 
 #ifndef SRC_VM_REFCOUNTED_H_
 #define SRC_VM_REFCOUNTED_H_
 
 #include "src/shared/globals.h"
 #include "src/shared/atomic.h"
 
-namespace fletch {
+namespace dartino {
 
 template <typename T>
 class Refcounted {
  public:
   Refcounted() : ref_count_(1) {}
   ~Refcounted() { ASSERT(ref_count_ == 0); }
 
   void IncrementRef() {
     ASSERT(ref_count_ > 0);
     ref_count_++;
   }
 
   static void DecrementRef(T* object) {
     ASSERT(object->ref_count_ > 0);
     if (--object->ref_count_ == 0) {
       delete reinterpret_cast<T*>(object);
     }
   }
 
  private:
   Atomic<int> ref_count_;
 };
 
-}  // namespace fletch
+}  // namespace dartino
 
 #endif  // SRC_VM_REFCOUNTED_H_