add an option for multi-class capabilities

[AmandaWasserman]

Right now the code auto assigns type Ia one value and all other SN another value. Figure out where this is happening and update it to assign number's corresponding to Ved's classifier (eg. Ib one value, Ic another, etc). Will probably be good to start with SNPCC, but may have to change for ELAsTiCC.

[AmandaWasserman]

probably better to actually do this by adding ved's classifier as an option and then within that doing the multi-class stuff