fresh copy of repository for proto v4 development

svn path=/branches/proto/v4/boost/multi_index_container_fwd.hpp; revision=44395
merged from trunk

svn path=/branches/proto/v4/libs/multi_index/; revision=47983
merged from trunk

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

svn path=/branches/proto/v4/boost/multi_index_container.hpp; revision=48781
merged from trunk

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

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