Create a development branch for the hash library.

svn path=/branches/hash/boost/serialization/; revision=38869
Merge from trunk.

svn path=/branches/hash/libs/serialization/; revision=39287
Merge with the offending files removed.

svn path=/branches/hash/boost/serialization/; revision=39995
Merge from trunk.

svn path=/branches/hash/boost/strong_typedef.hpp; revision=40260