r189@gandalf: fugalh | 2006-07-18 17:54:25 -0600

 r189@gandalf:  fugalh | 2006-07-18 17:54:25 -0600
 This is the first swath of changes, replacing add_undo with MementoCommand
 pattern, through most of the editor_mouse.cc file. However there were a few
 places that weren't symmetrical that I need to think about. The question is
 whether to tweak things so that they are symmetrical (add_undo paired with
 add_redo*), or to allow Commands to not be undoable or not be redoable. Your
 thoughts are welcome.

git-svn-id: svn://localhost/ardour2/branches/undo@685 d708f5d6-7413-0410-9779-e7cbd77b26cf