update NLP, Opt, & RL sections

update courses on DL, vision seminars

add DLCV UMich youtube link

update Gen-ML section (51, 52)

add CV courses, ML summer camps

update MLSS & RL sec

update DL, NLP sections

fix stale links in ML fundamentals

update LinAlg section

add new DL courses #46

fix stale links; add new DL, ML courses

update ML, BDL courses

update summer school, computer vision and DL sections

update DNN, ML, Optim, RL, PGM, & CV sections

update med. img & bootcamp section