add fields method: scraped field name list
Checking in changes prior to tagging of version 0.04.

Changelog diff is:

diff --git a/Changes b/Changes
index 204d1c5..5e53e5f 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,10 @@ Revision history for Perl extension WWW-DojinEvent

 {{$NEXT}}

+0.04 2013-06-01T04:46:35Z
+
+    - add fields method: scraped field name list
+
 0.03 2013-05-31T18:00:05Z

     - add Creation.pm #3