Clang 3.8, gcc 5, Visual Studio 2017 and Xcode 8 are now the minimum
supported compilers, and they all support C++14, so we may as well use it.
- Change all make_ptr to make_unique
- Change iterator begin(), end(), etc to const versions where appropriate
- Remove UniquePtr, since C++14 supports it natively
Added updated C++14 make_unique templates, which now allow to also
use unique_ptr for arrays.
Updated SoundSDL class to use unique_ptr, eliminating another new/delete
pair.
git-svn-id: svn://svn.code.sf.net/p/stella/code/trunk@3171 8b62c5a3-ac7e-4cc8-8f21-d9a121418aba
Stephen Anthony