More return types. Basic example

examples/basic.php

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+<?php
+
+require_once("vendor/autoload.php");
+
+use DNW\Skills\TrueSkill\TwoPlayerTrueSkillCalculator;
+use DNW\Skills\GameInfo;
+use DNW\Skills\Player;
+use DNW\Skills\Team;
+use DNW\Skills\Teams;
+
+$gameInfo = new GameInfo();
+
+$p1 = new Player("Winner");
+$p2 = new Player("Average");
+$p3 = new Player("Looser");
+
+
+$team1 = new Team($p1, $gameInfo->getDefaultRating());
+
+$team2 = new Team($p2, $gameInfo->getDefaultRating());
+
+for($i = 0; $i < 5; $i++) {
+    echo "Iteration: $i\n";
+    $teams = Teams::concat($team1, $team2);
+
+    $calculator = new TwoPlayerTrueSkillCalculator();
+
+    $newRatings = $calculator->calculateNewRatings($gameInfo, $teams, [1, 2]);
+
+    $team1 = new Team($p1, $newRatings->getRating($p1));
+    $team2 = new Team($p2, $newRatings->getRating($p2));
+
+    echo "P1: ". $newRatings->getRating($p1)->getConservativeRating() . PHP_EOL;
+    echo "P2: ". $newRatings->getRating($p2)->getConservativeRating() . PHP_EOL;
+}
+
+
+