Declare each class property on separate lines

It's easier to read and also type hint and do a lot of
things when class properties are declared this way. I think
this is the standard way and it's an improvement :)

Also, added soft type hint phpdoc for these class properties.

Change-Id: I6f2bee7d5cd771f25241abcaebfacd6eb540175f

includes/SkinTimeless.php

@@ -5,8 +5,14 @@
  * @ingroup Skins
  */
 class SkinTimeless extends SkinTemplate {
-	public $skinname = 'timeless', $stylename = 'Timeless',
-		$template = 'TimelessTemplate';
+	/** @var string */
+	public $skinname = 'timeless';
+
+	/** @var string */
+	public $stylename = 'Timeless';
+
+	/** @var string */
+	public $template = 'TimelessTemplate';
 
 	/**
 	 * @param OutputPage $out