Add gfycat plugin.

NEWS.md

@@ -12,6 +12,8 @@ Legend:
 * Coleslaw now handles **deploy-dir**, **repo**, and **staging-dir**
   config options more gracefully. Previously, various errors could be
   encountered if directory options lacked a trailing slash.
+* **New Plugin**: Support for [embedded gfycats][http://gfycat.com/] has been added.
+
 
 ## Changes for 0.9.6 (2014-09-27):
 

docs/plugin-use.md

@@ -21,6 +21,12 @@
 
 **Example**: `(disqus :shortname "disqus-provided-unique-id")`
 
+## HTML5 Gifs via Gfycat
+
+**Description**: Provides support for embedding [gfycat](http://gfycat.com/) gifs.
+
+**Example**: `(gfycat)`
+
 ## Hosting via Github Pages
 
 **Description**: Allows hosting with CNAMEs via

plugins/gfycat.lisp

@@ -0,0 +1,25 @@
+(defpackage :coleslaw-gfycat
+  (:use :cl)
+  (:export #:enable)
+  (:import-from :coleslaw #:add-injection
+                          #:content
+                          #:tag-p))
+
+(in-package :coleslaw-gfycat)
+
+(defvar *gfycat-header*
+  "<script>
+ (function(d, t) {
+    var g = d.createElement(t),
+        s = d.getElementsByTagName(t)[0];
+    g.src = 'http://assets.gfycat.com/js/gfyajax-0.517d.js';
+    s.parentNode.insertBefore(g, s);
+}(document, 'script'));
+</script>")
+
+(defun enable ()
+  (flet ((inject-p (x)
+           (when (and (typep x 'content)
+                      (tag-p "gfycat" x))
+             *gfycat-header*)))
+    (add-injection #'inject-p :head)))