changes elsewhere. boost/iterator and libs/iterator/test were updated from branch "simplify" [SVN r20905]
for handling vc6/7 deficiencies with iterator_traits. Fixed a bug in iterator_facade which was causing incomplete types to be passed through is_convertible. Reinstated libs/utility/iterator_traits_test.cpp [SVN r19840]
[SVN r19143]
[SVN r18960]