[plt-scheme] function for reading text from Scheme files

Danny Yoo wrote:

>> It would be nice to have a way of doing this without running mred 
>> (which Eli's script does), because that requires a connection to an X 
>> server.
> 
> There's always the workaround of keeping a virtual x server up to 
> provide the graphical context through the 'Xvfb' program.  Would that be 
> acceptable?

That's a clever idea, and I will investigate it. --PR