added notifications to crop manipulation, still need to think about this...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
bugfix and updated todo...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
made current crop modes a bit more generic...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
made crop modes alot more generic...

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>