Support for multiclass classification analysis

[LogIN-]

Add support for classification task with more than two classes; e.g., classify a set of images of fruits which may be oranges, apples, or pears. Multi-class classification makes the assumption that each sample is assigned to one and only one label: a fruit can be either an apple or a pear but not both at the same time.

[EdieGuo11]

hello! thanks for adding this! where do you find the option to use the classification system on simon?