Consolidated patches and performance tweeks.

[SVN r31492]

include/boost/regex/v4/basic_regex.hpp

@@ -66,6 +66,7 @@ struct regex_data
    unsigned char               m_startmap[1 << CHAR_BIT]; // which characters can start a match
    unsigned int                m_can_be_null;             // whether we can match a null string
    re_detail::raw_storage      m_data;                    // the buffer in which our states are constructed
+   typename traits::char_class_type    m_word_mask;       // mask used to determine if a character is a word character
 };
 //
 // class basic_regex_implementation