Patch for dragging photos to categories

[Lee Willis <lee leewillis co uk>]

The patch at:

http://www.leewillis.co.uk/f-spot/dnd.patch

Adds support to allow you to simply drag a photo, or photos to a tag and
have them associated with the tag.

This is my first f-spot patch so I'm sure there'll be some comments on
the patch (Some bits didn't seem to work where I wanted them, so they
may be in odd places architecturally). I've also changed some of the
selection code in IconView.cs without significant knowledge about what I
was doing, however it seems to have fixed the problem I was experiencing
without breaking anything else.

All comments welcome!

Lee
-- 
Lee Willis <lee leewillis co uk>