specialization of convert_impl for map_tag, refs #8759

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Quickbook version of docs.

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Update history and regenerate docs.

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Trivial fix of visibility issue (refs #8751)

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Basic commit of C++11 move constructor and move assignment for circular_buffer (refs #7888). some of the functions marked with BOOST_NOEXCEPT

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Rethrow exception without slicing. Fixes #6036.

Maybe it should use `catch(...)`, that's what iostreams uses everywhere else.

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