Initial superpixel implementation

Signed-off-by: Luiz Carlos Cavalcanti <luiz@home-desktop.(none)>
Added more universal script (compatible with zsh and stuff)

Signed-off-by: Luiz Carlos Cavalcanti <cavalcanti.luiz@gmail.com>
Added color histogram to Ghiasi 2013

Signed-off-by: Luiz Carlos Cavalcanti <cavalcanti.luiz@gmail.com>