[Greasemonkey] Edit Script Values from Script Manager

[Bill Donnelly]

I always suggest and encourage this:

Additional benign metadata items that Gm ignores.

For example:

// @Version       1.3.0
// @Firefox       1.5+
// @GmVersion     0.6.4
// @Author        William Donnelly
// @Email         snowcrest.net | donnelly

And it would be nice if these were displayed, along with the others,
in an information/about dialog.
(when the item is double-clicked, or whatever)