First TwoPlayerTrueSkillCalculator unit test passed

PHPSkills/ISupportPartialPlay.php

@@ -0,0 +1,16 @@
+<?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();
+}
+
+?>