Merge branch 'develop' into safari-audio

package.json

src/.eslintrc.js

src/components/audio-trimmer/audio-trimmer.css

src/components/audio-trimmer/audio-trimmer.jsx

src/components/close-button/close-button.css

src/components/controls/controls.css

src/components/controls/controls.jsx

src/components/costume-canvas/costume-canvas.jsx

src/components/forms/input.css

src/components/green-flag/green-flag.css

src/components/green-flag/green-flag.jsx

src/components/green-flag/icon-green-flag.svg

src/components/gui/gui.css

src/components/gui/gui.jsx

src/components/library-item/library-item.css

src/components/sound-editor/sound-editor.css

src/components/sprite-info/icon--hide.svg

src/components/sprite-info/icon--show.svg

src/components/sprite-info/icon--x.svg

src/components/sprite-info/icon--y.svg