Add author and date to blog posts, stylistic changes, graphql changes

src/pages/index.js

@@ -187,6 +187,7 @@ const IndexPage = ({ ...props }) => (
                   url={`blog/${node.slug}`}
                   title={node.title}
                   date={node.date}
+                  authorName={node.author.name}
                   imgAlt={node.title}
                   excerpt={node.excerpt}
                   image={
@@ -218,6 +219,10 @@ export const query = graphql`
         node {
           id
           title
+          author {
+            id
+            name
+          }
           excerpt
           status
           slug