Update comments to reflect https://svn.boost.org/trac/boost/ticket/9595
BOOST_NO_CXX11_ALLOCATOR should be defined with libc++ in C++03 mode
Add test case for BOOST_NO_CXX11_ALLOCATOR
Merge pull request #14 from glenfe/develop

BOOST_NO_CXX11_ALLOCATOR should be defined with libc++ in C++03 mode
Add constants for memory models used by gnu "__ATOMIC..." intrinsics.  These
should be supplied by the compiler, but until they are we will define them
here.

Once they are defined in the compiler we will need to start sorting out
compiler versions in cray.hpp
Merge branch 'update-cray-config'