Tool to convert C++98 and C++03 code to C++11

 The purpose of the C++11 Migrator is to do source-to-source translation to
 migrate existing C++ code to use C++11 features to enhance
 maintainability, readability, runtime performance, and compile-time
 performance. Development is still early and transforms fall mostly into
 the first two categories. The migrator is based on Clang's LibTooling and
 the AST Matching library.