Added $.superbox.close() to close SuperBox! from script. (fixes #12)

Author: bpierre

doc/english.html

@@ -84,7 +84,7 @@ <h2>Getting started</h2>
 	<strong>prevTxt</strong>: "Previous", // "Previous" button text
 	<strong>nextTxt</strong>: "Next" // "Next" button text
 };</code></pre>
-		
+    <p>It is also possible to close SuperBox! from a script, by calling the <code>$.superbox.close()</code> function.</p>
 		<div id="mode-image">
 			<h2>Picture mode</h2>
 			<p>Displays a box containing a picture.</p>

doc/francais.html

@@ -77,6 +77,7 @@ <h2>Mise en route</h2>
 	<strong>prevTxt</strong>: "Previous", // Texte du bouton "previous"
 	<strong>nextTxt</strong>: "Next" // Texte du bouton "Next"
 };</code></pre>
+    <p>Il est également possible de fermer SuperBox! depuis un script, en appelant la fonction <code>$.superbox.close()</code>.</p>
 
 		<div id="mode-image">
 			<h2>Mode image</h2>

jquery.superbox.js

@@ -334,7 +334,10 @@
 					showBox();
 				});
 			});
-		}
+		},
+		
+		// Close SuperBox!
+		close: hideAll
 	});