add link to FAQ

Author: wpears

src/Home.jsx

@@ -11,6 +11,7 @@ class Home extends Component {
         <div className="intro">
           <Header type={1} headingText="HMDA Data Browser">
             <p className="lead">The HMDA Data Browser allows users to filter, analyze, and download HMDA datasets and visualize data through charts, graphs, and maps.</p>
+            <p className="lead">For questions about the HMDA Data Browser, visit out <a href="/documentation/2018/faq/">FAQ page</a>.</p>
           </Header>
         </div>