[Kst] .kst file format

[George Staikos]

I spent some time debugging Kst files and why the old ones don't load 
properly.  There is no code that picks up plots and places them in a "default 
view".  I think this will be conceptually hard to implement with the current 
<window> implementation.  It presently looks like this:

<plot>
</plot>
<window>
   <plot>foo</plot>
</window>

So "plot" is loaded but not hooked into a window until the <window> node 
references it.  I was envisioning something more like this:
<window>
   <plot>
   // entire plot body
   </plot>
</window>

This allows us to be easily backwards compatible with old Kst files, but not 
the other way around.  I don't think that matters though.  Even if the old 
Kst can load new Kst files, it can't properly render them.  This format 
allows us to load all plots inline too, which I think is a bonus (less 
complicated).  Again, it does prevent single plot in multiple views, but we 
decided against that so I think it's fine.

-- 
George Staikos
KDE Developer			http://www.kde.org/
Staikos Computing Services Inc.	http://www.staikos.net/