Merge pull request #3559 from benjiwheeler/alert-project-lifecycle

src/components/alerts/alert.css

src/components/alerts/alert.jsx

src/components/alerts/alerts.jsx

src/components/close-button/close-button.jsx

src/components/menu-bar/menu-bar.jsx

src/components/spinner/spinner.css

src/containers/alert.jsx

src/css/colors.css

src/lib/alerts/index.jsx

src/lib/assets/icon--success.svg

src/lib/project-saver-hoc.jsx

src/lib/vm-listener-hoc.jsx

src/reducers/alerts.js

src/reducers/project-state.js

test/unit/reducers/alerts-reducer.test.js

test/unit/reducers/project-state-reducer.test.js

test/unit/util/project-saver-hoc.test.jsx