minor cleanup...

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

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

Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
added several key-bindings, some work on saving state...

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