New v.digit digitizer specification file

[Tim Martin; FSO; Soil Sciences]

Dave,
 
> I should add:
> 
>     1.  This will take some work on the tester's part to read the digitizer
> 	manual and build the config file for their digitizer.  We 
> 	can set it up so that if there are duplications, the successes
> 	are shared.
     
No problem: I'll enjoy the learning involved.  The only limitation
might be that I don't think the manual has much information in it,
but I'll wait and see what information is needed, when the time comes.

Tim.