merge [77446] from trunk

svn path=/branches/release/boost/signals2.hpp; revision=77447
merge  [77417],[77437],[77422],[77587] from trunk

svn path=/branches/release/boost/signals2.hpp; revision=77589
merge [77416] from trunk, fixes #6131, fixes #6455

svn path=/branches/release/boost/signals2.hpp; revision=77591
Merge: Allow to specify how option's value is named in help message.

Fixes #4781.

svn path=/branches/release/boost/signals2.hpp; revision=77932
Merged bug fixes for Boost.Graph and Boost.PropertyMap from trunk

svn path=/branches/release/boost/signals2.hpp; revision=78639
Merged in more trunk bug fixes for Boost.Graph and Boost.PropertyMap

svn path=/branches/release/boost/signals2.hpp; revision=78641
Merged warning fixes from trunk

svn path=/branches/release/boost/signals2.hpp; revision=78652
Merged first batch of 1.51 changes for Boost.Graph and Boost.PropertyMap

svn path=/branches/release/boost/signals2.hpp; revision=79189
Second batch of Boost.Graph and Boost.PropertyMap changes for 1.51

svn path=/branches/release/boost/signals2.hpp; revision=79191
Merge from trunk.  Fixes #6655


svn path=/branches/release/boost/signals2/; revision=79273
Merged more changes (bug fixes, especially hopefully fixing the VC++ test failure) from trunk

svn path=/branches/release/boost/signals2.hpp; revision=79390
Merged bug fix from trunk

svn path=/branches/release/boost/signals2.hpp; revision=79393
Merge program_options revisions 79280 and 79283.

svn path=/branches/release/boost/signals2.hpp; revision=79758
Merged r79227 from trunk, hopefully fixing all VC++ Boost.Graph Graphviz test issues

svn path=/branches/release/boost/signals2.hpp; revision=79771
merged [80550], allowing users to force result_of to use decltype

svn path=/branches/release/boost/signals2.hpp; revision=80551
Merge bug fixes to release; Fixes #7399 Fixes #7400 Fixes #7401

svn path=/branches/release/boost/signals2.hpp; revision=80670
Merge doc fixes to release; Fixes #7244

svn path=/branches/release/boost/signals2.hpp; revision=80694
Merged Boost.Graph changes from trunk

svn path=/branches/release/boost/signals2.hpp; revision=80740
Changed version to 1.53

svn path=/branches/release/boost/signals2.hpp; revision=81305
Merge to release.  Fixes #7712


svn path=/branches/release/boost/signals2/; revision=81432