Change to support named destination and test files

[Jay Bryant]

Hi, folks,

I sorted the destinationList in PDFDocument. To do so, I used 
Collections.sort(), which required creating a comparator class.

It works!

You can see the results at http://www.bryantcs.com/fop/test/fruit-link.pdf, 
which contains four links to http://www.bryantcs.com/fop/test/fruits.pdf. At 
least for me (using Firefox), all the links open where they should.

Jay Bryant
Bryant Communication Services