New Command - append

- New "append" command concatenates additional text onto an existing
  task description.
- Added unit tests to append command.

ChangeLog

@@ -1,6 +1,12 @@
 
 ------ current release ---------------------------
 
+1.6.0 (?)
+  + Added support for new "append" command that adds more description text to
+    an existing task.
+
+------ old releases ------------------------------
+
 1.5.0 (3/15/2009)
   + Removed deprecated TUTORIAL file.
   + Removed "showage" configuration variable.
@@ -43,8 +49,6 @@
   + Fixed bug that prevented the summary report from properly reporting
     recently completed tasks.
 
------- old releases ------------------------------
-
 1.4.3 (11/1/2008) 8639e9260646c8c9224e0fc47e5d2443b46eecfc
   + Fixed misleading task count at bottom on "info" report.
   + Added support for a shadow file that contains a plain text task report,