+Version 0.5.0 (2017-07-??)
+--------------------------
+
+* Add option -r for rm.py.
+
+* Use remove-old-files.py to cleanup pip cache.
+
+Version 0.4.0 (2017-06-04)
+--------------------------
+
+* Add package 'ppu'.
+
+* Add module ppu/find_executable.py.
+
+* Add script which.py.
+
+Version 0.3.2 (2017-05-01)
+--------------------------
+
+* Convert README to reST.
+
+Version 0.3.1 (2017-04-30)
+--------------------------
+
+* Fix release: build scripts with '/usr/bin/env python'
+
+Version 0.3.0 (2017-04-30)
+--------------------------
+
+* Move cmp.py, remove-old-files.py and rm.py to scripts directory.
+
+* Release at PyPI.
+
+Version 0.2.0 (2017-04-30)
+--------------------------
+
+* Add cmp.py and rm.py.
+
+* Test at Travis and AppVeyor.
+
+* Use subprocess.call() instead of os.system().
+