Index failed... Revert "rename RenameNameSpace to RenameNamespace"

This reverts commit 334bf37b4b265220031a7af647dd18766d904ea5.

Conflicts:
	lib/App/PRT/Command/Help.pm
	t/App-PRT-Command-RenameNameSpace.t
Checking in changes prior to tagging of version 0.18.

Changelog diff is:

diff --git a/Changes b/Changes
index de6a341..c9eb7fc 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,9 @@ Revision history for Perl extension App-PRT

 {{$NEXT}}

+0.18 2014-09-02T01:37:56Z
+    - Index failed. reverted 334bf37b4b265220031a7af647dd18766d904ea5
+
 0.17 2014-09-02T01:01:32Z
     - Rename rename_name_space to rename_namespace (thanks miyagawa)
     - Delete help command for DRY. You can use perldoc prt instead.