Add section shortcode.

It seems there are some issues in wrapping complex blocks of markdown in
html tags, especially when the block contains other short codes.
Content would either only partially render or fail completely.

README.md

@@ -31,12 +31,28 @@ The site specific parameters that this theme :wrecognizes are:
 
 ## Shortcodes
 
-- `sidenote`: Wrap text to produce an automatically numbered sidenote.
-  The single positional argument is a required unique identifier.
-  Example: `{{% sidenote "sn-example" %}}Some sidenote{{% /sidenote %}}`
-- `marginnote`: Wrap text to produce a numberless margin note.
-  The single positional argument is a required unique identifier.
-  Example: `{{% marginnote"mn-example" %}}Some marginnote{{% /marginnote%}}`
+This theme provides the following shortcodes. 
+
+- `marginnote`
+  - Description: Wrap text to produce a numberless margin note.
+  - Usage: Accepts a required positional argument that is the margin note id.
+  `{{% marginnote "<margin note id>"" %}}...{{% /marginnote %}}`
+  - Example: `{{% marginnote "mn-example" %}}Some marginnote{{% /marginnote%}}`
+
+- `section`
+   - Description: This shortcode is provided as a work-around for wrapping
+   complex blocks of markdown in section tags.
+   - Usage: `{{< section "<begin || end>" >}}` map respectively to
+   `<section>` and `</section>` tags.
+   - Example: `{{< section "begin" >}}` inserts a `<section>` tag, while
+   `{{<section "end" >}}` inserts the closing `</section>` tag.
+
+- `sidenote`
+  - Description: Wrap text to produce an automatically numbered sidenote.
+  - Usage: identical to `marginnote`. 
+  Accepts a required positional argument that is the side note id.
+  `{{% sidenote "<side note id>"" %}}...{{% /sidenote %}}`
+  - Example: `{{% sidenote "sn-example" %}}Some sidenote{{% /sidenote %}}`
 
 ## Templates
 TODO

layouts/shortcodes/section.html

@@ -0,0 +1,9 @@
+{{ with .Get 0 }}
+  {{ if eq . "begin" }}
+      <section>
+  {{ else if eq . "end" }}
+      </section>
+  {{ end }}
+{{ end }}
+   
+