New add image view

I changed the way people can add pictures to an album. In previous versions it was possible to add one picture a time. In this version, a user can add unlimited pictures with just one click. I use a filechooser where multiple files can be selected. As you can see in the background, I'm also changing the way how pictures are shown in the explorer. But this is not yet finished.

Btw: the JCpg sourcecode can be viewed at http://coppermine.svn.sourceforge.net/viewvc/coppermine/branches/cpg1.5.x/JCpg/