Updating Xcode project template to support C++11 and to include the
preprocessor directives we have defined for Rosetta. Additionally, this
revision updates the flags that are used when building with Xcode to
more closely match the flags used when building with SCons. This means
that you will see the same set of warnings when using SCons or Xcode. No
more '999+ Warnings!
To use the new template, go to Rosetta/main/source/Xcode and delete
Rosetta.xcodeproj/project.pbxproj. Then run the project generation
script (python make_project.py all) and you will be set!