Cleanup in src/, adding namespaces, removing php closing tag and general code cleanup

src/ISupportPartialPlay.php

@@ -1,16 +1,12 @@
-<?php
-namespace Moserware\Skills;
+<?php namespace Moserware\Skills;
 
 /**
  * Indicates support for allowing partial play (where a player only plays a part of the time).
  */
- 
 interface ISupportPartialPlay
 {
     /**
      * Indicates the percent of the time the player should be weighted where 0.0 indicates the player didn't play and 1.0 indicates the player played 100% of the time.
      */
     public function getPartialPlayPercentage();
-}
-
-?>
+}