Added boxed blur filter

Signed-off-by: Luiz Carlos Cavalcanti <cavalcanti.luiz@gmail.com>
Added overrising in resize function

Signed-off-by: Luiz Carlos Cavalcanti <cavalcanti.luiz@gmail.com>
Moved gamma filter for a isolated class

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