ENH: update Boost to 1.49.0

Utilities/BGL/boost/algorithm/string/detail/case_conv.hpp

...ties/BGL/boost/algorithm/string/detail/classification.hpp

Utilities/BGL/boost/archive/iterators/binary_from_base64.hpp

Utilities/BGL/boost/archive/xml_wiarchive.hpp

Utilities/BGL/boost/bind/bind.hpp

Utilities/BGL/boost/blank.hpp

Utilities/BGL/boost/blank_fwd.hpp

Utilities/BGL/boost/config/auto_link.hpp

Utilities/BGL/boost/config/compiler/borland.hpp

Utilities/BGL/boost/config/compiler/clang.hpp

Utilities/BGL/boost/config/compiler/common_edg.hpp

Utilities/BGL/boost/config/compiler/cray.hpp

Utilities/BGL/boost/config/compiler/digitalmars.hpp

Utilities/BGL/boost/config/compiler/gcc.hpp

Utilities/BGL/boost/config/compiler/gcc_xml.hpp

Utilities/BGL/boost/config/compiler/hp_acc.hpp

Utilities/BGL/boost/config/compiler/intel.hpp

Utilities/BGL/boost/config/compiler/metrowerks.hpp

Utilities/BGL/boost/config/compiler/mpw.hpp

Utilities/BGL/boost/config/compiler/pathscale.hpp