Network: Add message notifying user of successful settings change.

When altering the Network Admin Settings there was no message letting the user know
the action was successful. Now the default WordPress updated box shows with a message
telling the user the updates were successful. Closes Automattic#270

Author: blobaugh

class.jetpack-network-sites-list-table.php

@@ -113,7 +113,8 @@ function column_cb($item) {
 	public function process_bulk_action() {
 		if( !isset( $_POST['bulk'] ) || empty ( $_POST['bulk'] ) )
 			return; // Thou shall not pass! There is nothing to do
-		
+
+
 		$jpms = Jetpack_Network::init();
 
 		$action = $this->current_action();

views/admin/network-settings.php

@@ -1,5 +1,14 @@
 <?php
 	extract( $data );
+
+
+if( isset( $_GET['updated'] ) && 'true' == $_GET['updated'] ) {
+?>
+
+<div class="updated">Jetpack Network Settings Updated!</div>
+
+<?php
+}
 ?>
 
 <div class="wrap">