C++: Remove unnecessarily instance of Objects
C++: Implement external ART file reader
C++: Implement Go style command line interface

 * There is no usage option.
 * Result file is not implemented yet.
C++: Remove in-place member initializer to support GCC 4.6
C++: Implement result file (JSON)
C++: Remove unnecessarily headers
Merge pull request #23 from t-mat/cpp-cli

C++: Implement Go style command line interface