Confusion & ClassificationTable: Increase confusion count

Increases the contents of cell(s) in the selected Confusion. The cells to increase are determined by the selected ClassificationTable.

## Behaviour

For each row in the ClassificationTable object the contents of one cell in the Confusion we be increased by one. This cell is determined as follows: we start by finding the label of the column which the largest number in it. This label is defined as the response label. We use the corresponding row label as the stimulus label. The content of the cell in the Confusion object whose row and column are labeled with stimulus label and response label, respectively, is increased by one.