Merge gist.github.com:5019615. @Shinpeim++
Write naked perl module file.
Rename xt tests.
Change permission to executable.
Change a handling about error status.
Add an exceptional handling (when CLI parameter is empty).
Add an exceptional handling (when rc file doesn't exist).
Change the style of error messages.
Remove duplicated 'glob'.
Integrate globing.
Add an exceptional handling (when sound file doesn't exist).
Write documents.
Improve exceptional handlings.
Change xt test cases.
Fix broken indentation.
Improve Build.PL
Improve a MANIFEST file.
Add LICENSE file.
Improve Build.PL
Write README files