Everything works automatically except for global symbols where some manual work is required. See the BuildInfo example.

Fixes compile error on Mac.

This potentially saves a second copy compared to using const
reference. See Effective Modern C++, Item 41.

Especially on iterator types and 'new' allocations.

Disabled PCH on Visual Studio 2015.

Set C++ standard the right way.

This is also untested and not compiled anywhere because of the undefined
macro MSVC.