Merge pull request #26 from rschamp/feature/layout

src/components/blocks/blocks.css

src/components/blocks/blocks.jsx

src/components/box/box.css

src/components/box/box.jsx

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

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

src/components/gui/gui.css

src/components/gui/gui.jsx

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

src/components/library-item/library-item.jsx

src/components/library/library.css

src/components/library/library.jsx

src/components/modal/modal.css

src/components/modal/modal.jsx

src/components/sprite-selector-item/sprite-selector-item.jsx

src/components/sprite-selector/sprite-selector.css

src/components/sprite-selector/sprite-selector.jsx

src/components/stage-selector/stage-selector.css

src/components/stage-selector/stage-selector.jsx

src/components/stage/stage.css