[TxMt] one more update to command line tool

[otheraccount at verizon.net]

>
> Another option is to use the recently introduced URL-scheme with the 
> open command.

Holy crap, of course! That butt-ugly GUI script was written before the 
URL-scheme appeared, and I hadn't fiddled with it since---this approach 
is clearly _vastly_ better. Thanks! (The only drawback I can see 
relative to the AppleScript monstrosity is that the URL thing currently 
won't work with files in a project window...)