Moved class extend() export to the top of the module to make it more noticable in the mess of functions

lib/class.js

@@ -29,6 +29,20 @@ var getset = ( Object.prototype.__defineGetter__ === undefined )
 ;
 
 
+/**
+ * Creates a class, inheriting either from the provided base class or the
+ * default base class
+ *
+ * @param  {Object}  base  object to extend (extends Class by default)
+ *
+ * @return  {Object}  extended class
+ */
+exports.extend = function( base )
+{
+    return extend.apply( this, arguments );
+}
+
+
 /**
  * Default class implementation
  *
@@ -146,20 +160,6 @@ var extend = function()
 }
 
 
-/**
- * Creates a class, inheriting either from the provided base class or the
- * default base class
- *
- * @param  {Object}  base  object to extend (extends Class by default)
- *
- * @return  {Object}  extended class
- */
-exports.extend = function( base )
-{
-    return extend.apply( this, arguments );
-}
-
-
 /**
  * Attaches extend method to the given function's prototype
  *