[boost] Update for the Cxx dual library

Subject: [boost] Update for the Cxx dual library
From: Edward Diener (eldiener_at_[hidden])
Date: 2016-07-22 11:13:53

The Cxx dual library, or CXXD for short, is a C++ macro header-only 
library which chooses between using a Boost library or its C++ standard 
equivalent library for a number of different C++ implementations, while 
using the same code to program either choice. An 'implementation', 
called a 'dual library', is a Boost library which has a C++ standard 
library equivalent whose public interfaces are nearly the same in both 
cases.

I have updated the Cxx dual library, for those who prefer to minimize 
their use of macros in source code, by providing an alternate method to 
the use of macros for including the appropriate header files and 
specifying the appropriate namespace for a dual library. In this 
alternate method including the appropriate header files is done by 
including an implementation header file, and specifying the appropriate 
namespace is done by using a C++ namespace alias. The alternate method, 
called the alias mode, is fully documented.

You can get the latest version of the Cxx dual library at 
https://github.com/eldiener/cxx_dual. Instructions for using the library 
are in the README.md file. PDF documentation is available in 
cxx_dual.pdf, HTML doc is availavble online at 
http://eldiener.github.io/cxx_dual and you can generate local HTML 
documentation using the doc jam file.

Questions, comments, bug reports are always welcome.