First TwoPlayerTrueSkillCalculator unit test passed

PHPSkills/ISupportPartialUpdate.php

@@ -0,0 +1,11 @@
+<?php
+namespace Moserware\Skills;
+
+interface ISupportPartialUpdate
+{
+    /**
+     * Indicated how much of a skill update a player should receive where 0.0 represents no update and 1.0 represents 100% of the update.
+     */
+    public function getPartialUpdatePercentage();
+}
+?>