Update chanelog

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3887 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CHANGES

+ -- Major revamp of PBX core including 'n' and 's' priorities and labels
  -- Deprecate pbx_wilcalu and app_qcall in favor of pbx_spool
  -- Remove old chan_iax and chan_vofr
  -- Major Caller*ID Restructuring