birdwalker2 updated

I just updated birdwalker2. New features include the ability to see all the photos for a trip, location, or county. I am refactoring the PHP code to use objects, which is working very nicely. In the course of doing this I lost track of some of my first sighting calculations, which I need to integrate with the new PHP objects. Another new plan -- tag my cvs repository when I post changes to my server, so I can write better release notes next time.