Clean up the rollback menu a bit by only displaying the last 5 entries by default.  Also added command-line options so that the user can alternatively specify an exact number of entries to be shown or just to show all of the entries.
Clean up the rollback menu a bit by only displaying the last 5 entries by default.  Also added command-line options so that the user can alternatively specify an exact number of entries to be shown or just to show all of the entries.

git-svn-id: 55bf3d274bcbe9e82fb62baa38e07bd3d37611b8@22801 651a555e-23ca-0310-84fe-ca9f7c59d2ea

cournape/ensetuptools,cournape/ensetuptools