Rename fletch -> dartino

src/vm/native_interpreter.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/native_interpreter.h"
 
-namespace fletch {
+namespace dartino {
 
 extern "C"
 uword Interpret_DispatchTable[];
 
 extern "C"
 void BC_InvokeStatic();
 
 extern "C"
 void Debug_BC_InvokeStatic();
 
@@ skipping 10 matching lines @@
   }
 }
 
 void ClearBytecodeBreak(Opcode opcode) {
   uword value = Interpret_DispatchTable[opcode];
   if ((value & 4) != 0) {
     Interpret_DispatchTable[opcode] = value + kDebugDiff;
   }
 }
 
-}  // namespace fletch
+}  // namespace dartino