- 
            Ceased dependence on Boost.Locale (replaced locale::conv::utf_to_utfwithx3::to_utf8), and Boost.Filesystem GH#596
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            Fixed infinity recursion in is_substitutetrait that was blocking recursive sequences via containers GH#461 GH#606
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            Fixed sequence parser in alternative into container GH#434 GH#605
          
- 
            Fixed some corner cases in alternative parser with container attribute,
            notably atribute-less parsers in alternative parser with container attribute
            were appending an empty value GH#394 GH#603 GH#604
          
- 
            Attribute type of alternative/sequence parsers now calculated without
            MPL, what removes MPL limits on alternative/sequence parser chain length
            GH#515 GH#607
          
- 
            Reverted GH#534 that made possible parsing optional<T>intoTGH#608
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            Removed unneeded reservebeforeinsertGH#611
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            Removed value_initializetrait GH#613
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            Removed unwanted move due to wrong pseudo_attributeusage, that was also causing bogus GCC-Wununinitlizedwarning GH#613
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            Removed unused boost/spirit/home/x3/support/utility/unrefcv.hppheader