fresh copy of repository for proto v4 development

svn path=/branches/proto/v4/boost/algorithm/; revision=44395
merged from trunk

svn path=/branches/proto/v4/libs/algorithm/; revision=45289
merged from trunk

svn path=/branches/proto/v4/boost/algorithm/; revision=45985
merged from trunk

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

svn path=/branches/proto/v4/libs/algorithm/; revision=48605
merged from trunk

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