Added supporting args note to Changelog for 0.1.9

Changelog

@@ -1,6 +1,11 @@
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 Change history
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+
+0.1.9 :date:`TBA` :author:askh@opera.com
+
+	* Tasks now supports both positional arguments and keyword arguments.
+
 0.1.8 :date:`2009-05-07 12:27 P.M CET` :author:askh@opera.com
 
 	* Better test coverage