Merging to release; Fixes #6576

svn path=/branches/release/libs/iostreams/; revision=79970
merged [80550], allowing users to force result_of to use decltype

svn path=/branches/release/libs/iostreams/; revision=80551
Merge bug fixes to release; Fixes #7399 Fixes #7400 Fixes #7401

svn path=/branches/release/libs/iostreams/; revision=80670
Merge doc fixes to release; Fixes #7244

svn path=/branches/release/libs/iostreams/; revision=80694
Merged Boost.Graph changes from trunk

svn path=/branches/release/libs/iostreams/; revision=80740
Changed version to 1.53

svn path=/branches/release/libs/iostreams/; revision=81305
Merge deprecated macro change for Boost.LocalFunction to release; no functionality change

svn path=/branches/release/libs/iostreams/; revision=81851
Merged boost::algorithm::gather and updated tests for Utility, Algorithm and Utility libraries

svn path=/branches/release/libs/iostreams/; revision=83154
merge [82960] to release, fixes #7663

svn path=/branches/release/libs/iostreams/; revision=83381
Merge iostreams to release. Fixes #8315, #8385, #8460.

Not merging the fallthrough macro, as config support hasn't been merged yet.
And not merging the build changes, as I don't know if they're ready.

svn path=/branches/release/libs/iostreams/; revision=84303
Merge iostreams to release.

Might as well merge now that the dependencies (BOOST_FALLTHROUGH support
and the new version of Boost.Build) are in release.

svn path=/branches/release/boost/iostreams/; revision=84508