add dl badge
add dl badge

Former-commit-id: 9d1725f91598bb3fbc120c72aa9d7cb946ed13a8
LBenzahia/cltk,D-K-E/cltk,kylepjohnson/cltk,diyclassics/cltk,cltk/cltk,TylerKirby/cltk,TylerKirby/cltk,LBenzahia/cltk,coderbhupendra/cltk,mbevila/cltk,marpozzi/cltk,eamonnbell/cltk