History
+2017/12/26: Version 6.7.0
+
+2017/11/13: implement subexp calls (?R), (?&name), (?-n), (?+n) for Perl syntax
+2017/09/25: use string pool of gperf for Unicode Property lookup function
+2017/09/16: fix #70: an empty greedy regex and a word boundary (.*\b) fails
+2017/09/13: remove a stack type STK_POS
+2017/09/08: fix #69: add a declaration of onig_end()
+2017/09/07: fix #68: Compilation failure in out-of-source build
+2017/09/03: [new] hexadecimal codepoint \uHHHH
+
2017/08/30: Version 6.6.1
2017/08/29: fix definition of \X to (?>\O(?:\Y\O)*)
* CP1251: contributed by Byte
+New feature of version 6.7.0
+--------------------------
+
+* NEW: hexadecimal codepoint \uHHHH
+* Reduced object size
+
+
New feature of version 6.6.1
--------------------------