> The Spider Objects

>            ONE_VS_REST object

>        A=ONE_VS_REST(C,H) returns an one_vs_rest object which trains algorithm
>        C on sub problems of type class i versus all other classes,
>        and is initialized with hyperparameters H. The classifiers are combined
>        by outputting the class with the largest positive output (this assumes
>        that classifiers output real values indicating confidence rather than
>        just +1,-1)

>        Model
>         child=svm            -- classifier to use for each sub-problem

>        Methods:
>         train, test, get_w
>        Example:

>       c1=[-1,1];c2=[1,1];c3=[0,-1];