add all 3 corpora to function convert_corpus()
add all 3 corpora to function convert_corpus()

marpozzi/cltk,kylepjohnson/cltk,diyclassics/cltk,cltk/cltk,TylerKirby/cltk,LBenzahia/cltk,eamonnbell/cltk,LBenzahia/cltk,coderbhupendra/cltk,D-K-E/cltk,TylerKirby/cltk,mbevila/cltk