Lazy Home: Lazy load latest blog posts and assets and group by week and

project.

Javascript tutti.js and timeline.js is needed, and then the following to
init the timeline:

$('.timeline')
    .timeline({
        url: '/api/timeline'
    });

# Javascript Notes:
## ES6 transpile:
* Files in src/scripts/js/es6/common will be transpiled from
modern es6 js to old es5 js, and then added to tutti.js
* Files in src/scripts/js/es6/individual will be transpiled from
modern es6 js to old es5 js to individual module files
## JS Testing
* Added the Jest test framework to write javascript tests.
* `npm test` will run all the javascript tests

Thanks to Sybren for reviewing

src/scripts/js/es6/common/templates/posts.js

@@ -0,0 +1,52 @@
+import { NodesFactoryInterface } from './nodes'
+import { thenLoadImage } from './utils';
+
+class Posts extends NodesFactoryInterface {
+    static create$item(post) {
+        let content = [];
+        let $title = $('<div>')
+            .addClass('display-4 text-uppercase font-weight-bold')
+            .text(post.name);
+        content.push($title);
+        let $text = $('<div>')
+            .addClass('lead')
+            .text(post['pretty_created']);
+        content.push($text);
+        let $jumbotron = $('<a>')
+            .addClass('jumbotron text-white jumbotron-overlay')
+            .attr('href', '/nodes/' + post._id + '/redir')
+            .append(
+                $('<div>')
+                    .addClass('container')
+                    .append(
+                        $('<div>')
+                            .addClass('row')
+                            .append(
+                                $('<div>')
+                                    .addClass('col-md-9')
+                                    .append(content)
+                            )
+                    )
+            );
+        thenLoadImage(post.picture, 'l')
+            .then((img)=>{
+                $jumbotron.attr('style', 'background-image: url(' + img.link + ');')
+            })
+            .fail((error)=>{
+                let msg = xhrErrorResponseMessage(error);
+                console.log(msg || error);
+            })
+        let $post = $('<div>')
+                .addClass('expand-image-links imgs-fluid')
+                .append(
+                    $jumbotron,
+                    $('<div>')
+                        .addClass('node-details-description mx-auto py-5')
+                        .html(post['properties']['_content_html'])
+                );
+        
+        return $post;
+    }
+}
+
+export { Posts };