Updates to How To library

package-lock.json

...ib/libraries/decks/animate/animate-name-pick-a-letter.gif

...b/libraries/decks/animate/animate-name-pick-a-letter2.gif

src/lib/libraries/decks/animate/animate-name-play-sound.gif

...ib/libraries/decks/chase-game/chase-game-add-backdrop.gif

...lib/libraries/decks/chase-game/chase-game-add-sprite1.gif

...lib/libraries/decks/chase-game/chase-game-add-sprite2.gif

...ib/libraries/decks/chase-game/chase-game-add-variable.gif

...ib/libraries/decks/chase-game/chase-game-change-score.gif

...b/libraries/decks/chase-game/chase-game-move-randomly.gif

.../libraries/decks/chase-game/chase-game-move-rightleft.gif

...lib/libraries/decks/chase-game/chase-game-move-updown.gif

.../libraries/decks/chase-game/chase-game-touching-score.gif

src/lib/libraries/decks/chase-game/chase-game-touching.gif

src/lib/libraries/decks/chase-game/lib-chasegame.jpg

src/lib/libraries/decks/clicker/add-sound.gif

src/lib/libraries/decks/clicker/add-whenclicked.gif

src/lib/libraries/decks/clicker/click-events.gif

src/lib/libraries/decks/clicker/click-goto.gif

src/lib/libraries/decks/clicker/click-sprite.gif