merged from trunk

svn path=/branches/proto/v4/libs/intrusive/; revision=45360
merged from trunk

svn path=/branches/proto/v4/boost/intrusive/; revision=45842
merged from trunk

svn path=/branches/proto/v4/boost/intrusive/; revision=45844
merged from trunk

svn path=/branches/proto/v4/boost/intrusive/; revision=47983
merged from trunk

svn path=/branches/proto/v4/libs/intrusive/; revision=49439
merged from trunk

svn path=/branches/proto/v4/libs/intrusive/; revision=49607