Clang creates horrific error messages for Boost.Preprocessor based code,
so for small number of arguments manually write out a few important
functions. Not doing this everywhere.
[SVN r75743]
Helps allocators which can't use incomplete pointers, and avoid using
base pointers where that might not be possible. And some other
reorganization. Storing arguments to emplace in a structure when
variadic template parameters aren't available. Changed some of the odd
design for working with older compilers.
[SVN r74742]
