This commit was manufactured by cvs2svn to create branch
'python-voidptr'.

svn path=/branches/python-voidptr/boost/boost/python/; revision=32815
void pointer conversion support, from Niall Douglas, then heavily
edited by DWA.

svn path=/branches/python-voidptr/boost/libs/python/; revision=32836
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svn path=/branches/python-voidptr/boost/libs/python/; revision=32838