trial option: in_memory
 - if $handle->options->{in_memory} is true,
   dbh uses :memory: as database in register user phase.
   in addition, all in database are backed up to file.
remove channels cache logic.
Connection.pm の戻すバージョン間違えた
Checking in changes prior to tagging of version v3.1.6.

Changelog diff is:

diff --git a/Changes b/Changes
index 1b8bee4..64b9a77 100644
--- a/Changes
+++ b/Changes
@@ -2,6 +2,16 @@ Revision history for Perl extension Uc-IrcGateway

 {{$NEXT}}

+v3.1.6 2014-01-11T17:59:39Z
+
+    - trial option: in_memory
+
+        - if $handle->options->{in_memory} is true,
+          dbh uses :memory: as database in register user phase.
+          in addition, all in database are backed up to file.
+
+    - remove channels cache logic.
+
 v3.1.5 2014-01-04T00:52:19Z

     - add cache logic for channels: