update changelog and browserid.spec on dev branch after branching 2011.12.28

ChangeLog

-train-2011.12.28 (in progress):
+train-2011.01.04 (in progress):
+
+train-2011.12.28:
   * improve animation during cert/assertion procedures in dialog: #709
   * user visible error message in dialog when under back breaking load: #738
   * cleanup and removal of stale deps from package.json

scripts/browserid.spec

 %define _rootdir /opt/browserid
 
 Name:          browserid-server
-Version:       0.2011.12.28
+Version:       0.2012.01.04
 Release:       1%{?dist}
 Summary:       BrowserID server
 Packager:      Pete Fritchman <petef@mozilla.com>