+WHAT'S NEW in version 1.1.1 (2014-07-17)
+ Fix a bug in removing excessive namespaces (lxml).
+
+WHAT'S NEW in version 1.1.0 (2013-11-26)
+ Show comment(s) before the root element.
+
+WHAT'S NEW in version 1.0.0 (2013-11-23)
+ With lxml.etree-based implementation show only child namespaces
+ (calculated as combined namespaces minus parent's namespaces).