A Clock Divider accepts a CV input as a gate, and creates a number of
beats based on input triggers.  Each time a beat occurs (when a CV value
goes from under 1.7 to 1.7 or above), a value of 1.7 is output for one
half of that beat.
The outputs are based on the division of each row, from 1 to 8: if the
current count is divisible by the output, it is triggered:
    1  2  3  4  5  6  7  8
/1  x  x  x  x  x  x  x  x
/2     x     x     x     x
/3        x        x      
/4           x           x
/5              x         
/6                 x      
/7                    x   
/8                       x