uyota 匠の一手

There are some major problems running on Windows platform in v1.0 version. Now, all of these problems are fixed and v1.1 is very much functional. Indeed, it came to a stage that I use it to maintain my pictures on flash cards.

It appears that JTree has performance problem updating tree nodes when the number of node is something significant. Thus, I added "mark deleted" and "delete marked" to operate on multiple pictures at once.