Add a feature to change sound depending on executed command.
Add an error message for when occur parse error of config file.
Apply perltidy.
Improved docs.
Rename the sample rc file.
Checking in changes prior to tagging of version 1.2.0.

Changelog diff is:

diff --git a/Changes b/Changes
index 8c1ccd4..29ebd07 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,9 @@
 Revision history for App-WithSound

+1.2.0  Thu Mar 14 00:42:43 JST 2013
+        - Changed using environment variables name.
+        - Added a function to play the different sound corresponded to discrete command.
+
 1.1.0  Wed Mar 06 00:45:10 JST 2013
         - Add a new function that playbacks sound during executing the command.
Add a contributor. @papix++