Add an --original-names option for gm-editor

[Alpaccalypse]

Would be handy to have DFHack be able to show the actual strings used by DF where they are now known. Basically something vaguely similar to --no-stringification (and obviously you can choose your own wording/syntax for this hypothetical option). gui/gm-editor just seemed the most obvious candidate, so not sure if there are other prime candidates for such an option, if you did decide to implement this.