Add possibility to use custom tokenizer
Add possibility to use custom tokenizer

mamaral/natural,dpraimeyuu/natural,PTaylour/natural,walkingdoctors/natural,NaturalNode/natural,Hugo-ter-Doest/natural,levy5674/natural,ahmedshuhel/natural,PMSI-AlignAlytics/natural,karimsa/natural,kjhenner/natural,mcanthony/natural,Logicify/natural,itamayo/natural,polymaths/natural,moos/natural