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            Boost.Endian is now used instead of its bundled prerelease version GH#550
          
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            Narrowed Proto and Phoenix inclusion for a 5-10% inclusion speed-up GH#558
          
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            Ceased dependence on Boost.Algorithm and Boost.LexicalCast GH#560
          
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            Added static assertion for meaningless rule attribute qualifiers GH#561
          
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            String literal was matching everything when <boost/spirit/include/qi_auto.hpp>header is included GH#579