Ability to do a 'quick config' in the config app using just 4 points

[GoogleCodeExporter]

It would be nice to be able to do a quick config just using the 4 corners 
and have touchlib automatically interpolate the rest of the values. This 
would also be nice if you are having trouble calibrating your screen in 
some areas.

*or* we could just have a shortcut key to fill in the value for the 
current point (using interpolation) as you are calibrating it

*or* allow you to skip points while you are configuring it and 
automatically have touchlib fill in those missing values at the end.

Original issue reported on code.google.com by [email protected] on 14 Dec 2007 at 4:46