Merge pull request #4937 from zoebentley/tutorial-updates

src/lib/libraries/decks/en-steps.js

src/lib/libraries/decks/index.jsx

src/lib/libraries/decks/steps/add-backdrop.en.png

src/lib/libraries/decks/steps/add-effects.en.png

src/lib/libraries/decks/steps/change-size.en.png

src/lib/libraries/decks/steps/fly-add-score.en.gif

src/lib/libraries/decks/steps/fly-choose-backdrop.en.gif

src/lib/libraries/decks/steps/fly-choose-character.en.gif

src/lib/libraries/decks/steps/fly-choose-scenery.en.gif

src/lib/libraries/decks/steps/fly-flying-heart.en.gif

src/lib/libraries/decks/steps/fly-keep-score.en.gif

src/lib/libraries/decks/steps/fly-make-interactive.en.gif

src/lib/libraries/decks/steps/fly-move-scenery.en.gif

src/lib/libraries/decks/steps/fly-object-to-collect.en.gif

src/lib/libraries/decks/steps/fly-say-something.en.gif

src/lib/libraries/decks/steps/fly-select-flyer.en.jpg

src/lib/libraries/decks/steps/fly-switch-costume.en.gif

.../libraries/decks/steps/glide-around-back-and-forth.en.png

src/lib/libraries/decks/steps/glide-around-point.en.png

src/lib/libraries/decks/steps/hide-show.en.png