Checking in changes prior to tagging of version 0.04.

Changelog diff is:

diff --git a/Changes b/Changes
index a0523e9..84e83f5 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,9 @@ Revision history for Perl extension WebService-MusixMatch

 {{$NEXT}}

+0.04 2014-09-03T22:59:12Z
+    - Fix document
+
 0.03 2014-09-01T23:37:58Z
     - Fix invalid default api_key
     - Fix document