Checking in changes prior to tagging of version 1.59_04.

Changelog diff is:

diff --git a/Changes b/Changes
index bce11c3..d24cbb5 100644
--- a/Changes
+++ b/Changes
@@ -1,5 +1,10 @@
 See http://github.com/miyagawa/cpanminus/ for the latest development.

+1.59_04 Sun Feb  3 09:04:12 PST 2013
+   [Improvements]
+      - Make file copy more reliable on Win32 (A.J. Lucas) #180
+      - Always send cpanminus User-Agent to the servers no matter which backend is used (curl, wget etc.)
+
 1.59_03 Fri Feb  1 10:42:57 PST 2013
    [Improvements]
       - Fix issues working with file:// URLs with drive letters on Win32 (A.J. Lucas) #180