Config using File

[Andrew Cagney <cagney at redhat dot com>]

FYI,

In Java the Right Way to handle anything involving a file or path is to 
create a File object and manipulate that.  For instance, instead of:
   Config.getBinDir () + "/" + "fstack"
the coder should write:
   new File (Config.getBinDir (), "fstack");
which will take care of all the "/" portability mess.

I've switched most of the Config directory paths to return File, instead 
of String.  Two, namely getGladeDir() and getImagesDir() were not 
switched.  They are passed onto Java-GNOME and that currently takes a 
String.  Partially converting them turned into a rats nest :-)

Andrew