[TxMt] save, activate, and deactivate commands

[Matthew Johnson]

Currently we have tab triggers, key commands, and drag commands as  
ways of activating commands in TextMate.  It would be very useful to  
be able to trigger commands when a file is saved, activated, or  
deactivated in the ui as well (there may be others but these are the  
ones that came to my mind).  One example of where this would be  
useful is saving a GTD project file and having it automatically  
update a conext file with any necessary changes.

What do others think of this?  Allan, how difficult would something  
like this be?

Matthew