Checking in changes prior to tagging of version 1.6104.

Changelog diff is:

diff --git a/Changes b/Changes
index 671437b..20e3ffc 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,9 @@
 See http://github.com/miyagawa/cpanminus/ for the latest development.

+1.6104  Tue Apr  2 18:02:53 PDT 2013
+   [New Features]
+      - Added --self-contained, it's like --local-lib-contained but without --local-lib (schwern)
+
 1.6103  Sat Mar 30 14:33:07 PDT 2013
    [Bug Fixes]
       - Fixed rare crash with version.pm loading order in perl 5.8 (tokuhirom)