replace long_description in setup to fix install error
replace long_description in setup to fix install error

LBenzahia/cltk,D-K-E/cltk,TylerKirby/cltk,cltk/cltk,kylepjohnson/cltk,diyclassics/cltk,TylerKirby/cltk,LBenzahia/cltk