Booelsk addition

Returnerar A or B :

    A  |  B  |  A or B
    ---+-----+-------
    0  |  0  |    0
    0  |  1  |    1
    1  |  0  |    1
    1  |  1  |    1

 Exempel :  or( 0b1101, 0b1011 ) -> 00001111

 Syntax : < x > | < y > | ou( x, y ) | or( x, y )