This patch adds move semantics and the features from N2351.  I believe
this brings GCC's shared_ptr in line with the latest C++ working
paper.

New tests and docs on the implementation choices are included. There
are a few places where further work could be done, see the new HTML
file for details. That doc is also available at
http://www.kayari.org/doc/c++/shared_ptr.html to save you reading the
HTML. I haven't linked to the new doc from any existing pages yet as
the C++0x status is still experimental and I don't know where these
sort of implementation notes will fit in Benjamin's new doc plan.

2007-11-13  Jonathan Wakely  <...>

        * include/tr1_impl/boost_shared_ptr.h: Add support for allocators,
        aliasing, make_shared and rvalue-references.
        * docs/html/20_util/shared_ptr.html: New.
        * testsuite/tr1/2_general_utilities/shared_ptr/cons/alias.cc: New.
        * testsuite/tr1/2_general_utilities/shared_ptr/cons/alloc.cc: New.
        * testsuite/tr1/2_general_utilities/shared_ptr/cons/move.cc: New.
        * testsuite/tr1/2_general_utilities/shared_ptr/assign/move.cc: New.
        * testsuite/tr1/2_general_utilities/shared_ptr/creation/alloc.cc: New.
        * testsuite/tr1/2_general_utilities/shared_ptr/creation/make.cc: New.
        * testsuite/tr1/2_general_utilities/shared_ptr/modifiers/
        reset_alloc.cc: New.

Tested x86_64/linux, OK for mainline?

Jon