Removed obsolete author tag. Fixed assignment operator to protect against self-assignment. Updated XalanDequeIterator and XalanDeque to avoid exposing data members.  Fixed some issues where exceptions might cause memory leaks. Used a typedef for better clarity, and added and updated some comments.
Removed obsolete author tag. Fixed assignment operator to protect against self-assignment. Updated XalanDequeIterator and XalanDeque to avoid exposing data members.  Fixed some issues where exceptions might cause memory leaks. Used a typedef for better clarity, and added and updated some comments.

git-svn-id: b36ee6b6e70810a25e81bc801db00a83677983fc@724482 13f79535-47bb-0310-9956-ffa450edef68

AaronNGray/xalan,AaronNGray/xalan,AaronNGray/xalan,AaronNGray/xalan