[boost] [1.33.0] Unintentional dependency

I just realized that Boost.Parameter contains a dependency on boost/python/detail/is_xxx.hpp that I meant to fix before release by moving is_xxx.hpp into boost/detail. I'm certainly willing to wait until after 1.33.0 to fix this, but people complained bitterly about dependencies on boost/python/detail/indirect_traits.hpp before I did the same refactorization there. Doug, what do you think? -- Dave Abrahams Boost Consulting www.boost-consulting.com