Add German translation to the demo

Contributed by Gunter Schmidt

demo/i18n/demo-de.json

@@ -0,0 +1,3 @@
+{
+	"$1 has $2 {{plural:$2|kitten|kittens}}. {{gender:$3|He|She}} loves to play with {{plural:$2|it|them}}." : "$1 hat {{plural:$2|eine Katze|$2 Katzen}}. {{gender:$3|Er|Sie}} spielt sehr gerne mit {{plural:$2|ihr|ihnen}}."
+}

demo/index.html

@@ -50,6 +50,7 @@ <h1>jQuery i18n Demo</h1>
 			Display the above sentence in
 			<select class="language span3">
 				<option value="bn">Bengali</option>
+				<option value="de">German</option>
 				<option value="en">English</option>
 				<option value="he">Hebrew</option>
 				<option value="es">Spanish</option>