Change icon and version welcome page

Author: Planeshifter

tools/docs/www/src/app.jsx

@@ -239,8 +239,8 @@ class App extends Component {
 							path="/:version/docs/api/@stdlib/:pkg*"
 							render={this.renderReadme}
 						/>
-						<Route exact path="/" >
-							<WelcomePage />
+						<Route exact path="/:version/docs/api" >
+							<WelcomePage version={this.state.version} />
 						</Route>
 					</Switch>
 				</div>

tools/docs/www/src/side_menu.jsx

@@ -30,7 +30,7 @@ import AddIcon from '@material-ui/icons/Add';
 import RemoveIcon from '@material-ui/icons/Remove';
 import IconButton from '@material-ui/core/IconButton';
 import ClearIcon from '@material-ui/icons/Clear';
-import ChevronRightIcon from '@material-ui/icons/ChevronRight';
+import ChevronLeftIcon from '@material-ui/icons/ChevronLeft';
 import VERSIONS from './versions.json';
 import Logo from './logo.jsx';
 
@@ -270,11 +270,11 @@ class MenuBar extends Component {
 						}}
 					>
 						<div className="side-menu-head" >
-							<Link to="/">
+							<Link to={`/${this.props.version}/docs/api`}>
 								<Logo />
 							</Link>
 							<IconButton aria-label="close drawer" onClick={this.handleDrawerClose} edge="start" >
-								<ChevronRightIcon id="menu-close-icon" />
+								<ChevronLeftIcon id="menu-close-icon" />
 							</IconButton>
 						</div>
 						<select