Merge remote-tracking branch 'upstream/develop' into add-full-screen-render-view

.travis.yml

.tx/config

package.json

scripts/generate-locale-messages.js

src/components/gui/gui.css

src/components/gui/gui.jsx

src/components/language-selector/language-selector.jsx

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

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

src/components/library/library.jsx

src/components/sound-editor/sound-editor.jsx

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

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

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

src/components/stage/stage.css

src/components/target-pane/target-pane.jsx

src/components/turbo-mode/turbo-mode.jsx

src/containers/blocks.jsx

src/containers/costume-tab.jsx

src/containers/extension-library.jsx