Update deps
Specify lower limit of perl version
Checking in changes prior to tagging of version v0.0.12.

Changelog diff is:

diff --git a/Changes b/Changes
index 6358017..3a796c7 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,15 @@ Revision history for Perl extension Ukigumo::Agent

 {{$NEXT}}

+v0.0.12 2014-03-13T10:54:14Z
+
+    - Support GitHub webhooks
+      (mattn, tokuhirom)
+    - Support compare_url (for GitHub webhooks)
+      (moznion)
+    - Support GitHub Statuses API
+      (moznion)
+
 v0.0.11 2013-06-16T02:24:21Z

     - Older version does not install 'share/' directory.