Update changelog about Pageant fix (Fixes: #767)

debian/changelog

+pyhoca-gui (0.5.0.4-20150125) unstable; urgency=medium
+
+  [ Mike DePaulo ]
+  * Windows Build Process & Dependencies
+    - Update paramiko from upstream 1.5.2 to our modified
+      version, 1.15.2.1, which has the fix for upstream
+      bug #461 applied.
+      This fixes PyHoca-GUI's support for Pageant (the ssh agent.)
+      (Fixes: #767)
+
+ -- Mike DePaulo <mikedep333@gmail.com>  Sun, Jan 25, 2015 12:01:59 PM
+
 pyhoca-gui (0.5.0.4-0x2go1) unstable; urgency=medium
 
   [ Mike Gabriel ]