Fix #9 - ekphrastisize some poems

For ekphrastic articles, add `ekphrastic` node to YAML metadata.
This node includes subnodes `image`, `title`, `alt`, `link`, and `class`.
`image` provides a link to the local image--just include the file name
with the extension, not the folder (all images should be in /img/.)
`title` provides the title of the image, and the alt-text, if there
is no `alt` node.
`alt`, if it exists, provides the alt text for the image.
`link`, if present, wraps the image in an `<a>` tag--it should point
to the source web page of the ekphrastic image.
`class`, if present, sets the class(es) for the image, for styling.

In this commit, I've set `ekphrastic` on the four articles that have
them so far: 'The Death Zone,' 'AMBER alert,' 'The moon is gone,' and
'Man.' I've also updated .template.html with the changes, and updated
README.md to reflect the changes in YAML structure.

1 files changed, 10 insertions, 6 deletions

@@ -37,12 +37,16 @@
             
                     </header>
 
-        <section class="content prose">
-            <figure>
-            <img src="img/moongone.jpg" alt="The moon is gone" /><figcaption>The moon is gone</figcaption>
-            </figure>
-            <p>The <a href="http://apod.nasa.gov/apod/ap120102.html">moon is gone</a> and in its place a mirror. Looking at the night sky now yields nothing but the viewer’s own face as viewed from a million miles, surrounded by the landscape he is only vaguely aware of being surrounded by. He believes that he is <a href="apollo11.html">alone</a>, surrounded by desert and mountain, but behind him—he now sees it—someone is sneaking up on him. He spins around fast, but no one is there on <a href="serengeti.html">Earth</a>. He looks back up and they are yet closer in the night sky. Again he looks over his shoulder but there is nothing, not even a desert mouse. As he looks up again he realizes it’s a cloud above him, which due to optics has looked like someone else. The cloud blocks out the moon which is now a mirror, and the viewer is completely alone.</p>
-        </section>
+                    <div class="ekphrastic">
+                            <a href="http://apod.nasa.gov/apod/ap120102.html">
+                    <img src="img/moongone.jpg"
+                                            title="The moon is gone"
+                                                                alt="The moon is gone"
+                                                            />
+                </a>
+                        </div>
+        
+        <section class="content prose"><p>The moon is gone and in its place a mirror. Looking at the night sky now yields nothing but the viewer’s own face as viewed from a million miles, surrounded by the landscape he is only vaguely aware of being surrounded by. He believes that he is <a href="apollo11.html">alone</a>, surrounded by desert and mountain, but behind him—he now sees it—someone is sneaking up on him. He spins around fast, but no one is there on <a href="serengeti.html">Earth</a>. He looks back up and they are yet closer in the night sky. Again he looks over his shoulder but there is nothing, not even a desert mouse. As he looks up again he realizes it’s a cloud above him, which due to optics has looked like someone else. The cloud blocks out the moon which is now a mirror, and the viewer is completely alone.</p></section>
     </article>
     <nav>
                 <a class="prevlink" href="ronaldmcdonald.html"