fresh copy of repository for proto v4 development

[SVN r44395]
Merged revisions 44678-44679,44681-44689,44691-44692,44694,44697-44699,44704-44707,44711,44715,44717-44719,44722 via svnmerge from 
https://svn.boost.org/svn/boost/trunk

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  r44678 | chris_kohlhoff | 2008-04-20 22:43:42 -0700 (Sun, 20 Apr 2008) | 3 lines
  
  Add porthopper example to demonstrate applications that mix synchronous and
  asynchronous operations.
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  r44679 | chris_kohlhoff | 2008-04-20 22:52:20 -0700 (Sun, 20 Apr 2008) | 3 lines
  
  Remove a local variable that was hiding the ec parameter and preventing
  error codes from being correctly propagated. Fixes #1820.
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  r44681 | chris_kohlhoff | 2008-04-20 23:14:29 -0700 (Sun, 20 Apr 2008) | 2 lines
  
  Ensure all non-friend related functions are included in the documentation.
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  r44682 | chris_kohlhoff | 2008-04-20 23:15:17 -0700 (Sun, 20 Apr 2008) | 3 lines
  
  Add UNIX domain sockets, POSIX stream-oriented descriptors and Windows
  stream-oriented handles to the reference documentation.
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  r44683 | chris_kohlhoff | 2008-04-20 23:15:50 -0700 (Sun, 20 Apr 2008) | 2 lines
  
  Regenerate documentation.
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  r44684 | chris_kohlhoff | 2008-04-20 23:20:32 -0700 (Sun, 20 Apr 2008) | 3 lines
  
  Add documentation on the limits of the number of buffers that may be
  transferred in individual operations.
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  r44685 | chris_kohlhoff | 2008-04-21 00:59:21 -0700 (Mon, 21 Apr 2008) | 3 lines
  
  Add requirements for handle and descriptor services. Add new classes to the
  quickref index page.
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  r44686 | jhunold | 2008-04-21 01:07:55 -0700 (Mon, 21 Apr 2008) | 2 lines
  
  Remove trailing comma at end of enumerator list (gcc 4.x -pedantic error)
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  r44687 | johnmaddock | 2008-04-21 01:46:18 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Oops fix typo.
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  r44688 | johnmaddock | 2008-04-21 01:47:04 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Fix msvc warnings using new warning suppression header.
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  r44689 | johnmaddock | 2008-04-21 02:19:30 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Added new macro BOOST_NO_TEMPLATED_IOSTREAMS in response to issue #1765.
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  r44691 | speedsnail | 2008-04-21 04:46:03 -0700 (Mon, 21 Apr 2008) | 1 line
  
  removed act-as-jamfile, which gives errors when boost.use-project is not invoked from Jamroot file.
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  r44692 | johnmaddock | 2008-04-21 05:06:02 -0700 (Mon, 21 Apr 2008) | 2 lines
  
  Changed macro BOOST_PARTIAL_SPECIALIZATION_EXPLICIT_ARGS to BOOST_NO_PARTIAL_SPECIALIZATION_DEFAULT_ARGS.
  Changed <utility> to <boost/config/no_tr1/utility.hpp> in order to prevent cyclic dependencies between Fusion Tuples and TR1.
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  r44694 | johnmaddock | 2008-04-21 06:00:16 -0700 (Mon, 21 Apr 2008) | 2 lines
  
  Merged changes from the Sandbox, and rebuilt the docs.
  Also added some missing files.
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  r44697 | danieljames | 2008-04-21 08:55:40 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Factor out the code for choosing the bucket count, and which bucket that hash values map to make it easier to experiment with alternative policies.
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  r44698 | anthonyw | 2008-04-21 09:20:31 -0700 (Mon, 21 Apr 2008) | 1 line
  
  added private copy assignment operator and copy constructor to remove warnings
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  r44699 | anthonyw | 2008-04-21 09:22:16 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Revamped condition variable to try and fix swallowed-notify problems (trac issue #1834)
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  r44704 | pdimov | 2008-04-21 14:29:28 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Add ref_fn_test.cpp per #1846.
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  r44705 | pdimov | 2008-04-21 14:42:29 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Fix #1846.
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  r44706 | emildotchevski | 2008-04-21 15:42:54 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Fixed MSVC-specific compile errors when /Za command-line option is used, due to lack of throw() in std::~exception().
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  r44707 | pdimov | 2008-04-21 16:01:51 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Honor BOOST_NO_TEMPLATED_IOSTREAMS.
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  r44711 | daniel_frey | 2008-04-21 23:31:32 -0700 (Mon, 21 Apr 2008) | 1 line
  
  Avoid unneccessary increment/decrement of reference count
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  r44715 | johnmaddock | 2008-04-22 01:34:43 -0700 (Tue, 22 Apr 2008) | 1 line
  
  Added new files.
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  r44717 | dgregor | 2008-04-22 05:24:25 -0700 (Tue, 22 Apr 2008) | 1 line
  
  Resource-constrained shortest paths, from Michael Drexl
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  r44718 | hkaiser | 2008-04-22 07:13:58 -0700 (Tue, 22 Apr 2008) | 2 lines
  
  Spirit: Started to add '#include <boost/config/warning_disable.hpp>' to tests and examples.
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  r44719 | hkaiser | 2008-04-22 08:10:52 -0700 (Tue, 22 Apr 2008) | 1 line
  
  Spirit.Support: Minor change
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  r44722 | hkaiser | 2008-04-22 10:23:21 -0700 (Tue, 22 Apr 2008) | 1 line
  
  Wave: fixed #1843
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[SVN r44725]
merged from trunk

[SVN r45844]
merged from trunk

[SVN r47983]
merged from trunk

[SVN r48896]
merged from trunk

[SVN r49607]