Checking in changes prior to tagging of version v0.8.4.

Changelog diff is:

diff --git a/Changes b/Changes
index ad931e6..559d5c5 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,11 @@ Revision history for Perl extension Minilla

 {{$NEXT}}

+v0.8.4 2013-11-11T06:59:28Z
+
+    - Add 5.18 to default .travis.yml
+      (tagomoris)
+
 v0.8.3 2013-11-05T02:59:38Z

     [BUG FIX]