CHANGES.txt: Mention demo.py fixes

Author: techtonik

CHANGES.txt

@@ -18,6 +18,8 @@ Fixed:
 - [minor] Template responsive: make demo.py work out of the box with it,
   by setting the static_files config.ini setting to "static". 
   Footer: link fixed and hardcoded last modfied date removed. (Bernhard Reiter)
+- demo.py tracker home is configurable, its location is printed and
+  the directory is fully erased when nuking (anatoly techtonik)
 
 
 2012-12-21: 1.4.21