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, 6 insertions, 4 deletions

@@ -2,6 +2,11 @@
 title: The moon is gone and in its place a mirror
 genre: prose
 
+ekphrastic:
+    image: moongone.jpg
+    title: The moon is gone
+    link: 'http://apod.nasa.gov/apod/ap120102.html'
+
 project:
     title: Elegies for alternate selves
     css: elegies
@@ -14,9 +19,7 @@ project:
       link: mountain
 ...
 
-![The moon is gone](img/moongone.jpg)
-
-The [moon is gone][] and in its place a mirror.  Looking at the night sky now
+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 [alone][], surrounded by desert and mountain, but
@@ -30,4 +33,3 @@ completely alone.
 
 [alone]: apollo11.html
 [Earth]: serengeti.html
-[moon is gone]: http://apod.nasa.gov/apod/ap120102.html