merging current boost/python and libs/python from trunk into release branch

svn path=/branches/release/boost/python/; revision=79011
merging current boost/python and libs/python from trunk into release branch

svn path=/branches/release/libs/python/; revision=79096
boost.python: merging trunk to release

svn path=/branches/release/libs/python/; revision=81773
merging current boost/python and libs/python from trunk into release branch

svn path=/branches/release/libs/python/; revision=81965
merging current boost/python and libs/python from trunk into release branch

svn path=/branches/release/libs/python/; revision=82295