+4.1:
+ * ESPTREE implementation
+ * CurveIdtc26gost34102012256paramSetB, CurveIdtc26gost34102012256paramSetC,
+ CurveIdtc26gost34102012256paramSetD curve aliases
+ * Forbid any later GNU GPL version autousage
+ (project's licence now is GNU GPLv3 only)
+ * Project now is go-get-able: go get go.cypherpunks.ru/gogost/v4
+