A report function that calculates the quotient of two fields (columns) from the current
row.
This function expects its input values to be java.lang.Number instances.
The function undestands two parameters. The dividend parameter is required
and denotes the name of an ItemBand-field which is used as dividend. The
divisor parameter is required and denotes the name of an ItemBand-field
which is uses as divisor.
author: Heiko Evermann