Added Microsoft to the providers

Added auth provider for Microsoft accounts

src/League/OAuth2/Client/Provider/Microsoft.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace League\OAuth2\Client\Provider;
+
+class Microsoft extends IdentityProvider
+{
+    public $scopes = array('wl.basic', 'wl.emails');
+    public $responseType = 'json';
+
+    public function urlAuthorize()
+    {
+        return 'https://oauth.live.com/authorize';
+    }
+
+    public function urlAccessToken()
+    {
+        return 'https://oauth.live.com/token';
+    }
+
+    public function urlUserDetails(\League\OAuth2\Client\Token\AccessToken $token)
+    {
+        return 'https://apis.live.net/v5.0/me?access_token='.$token;
+    }
+
+    public function userDetails($response, \League\OAuth2\Client\Token\AccessToken $token)
+    {
+        $imageHeaders = get_headers('https://apis.live.net/v5.0/'.$response->id.'/picture', 1);
+
+        $user = new User;
+
+        $user->uid = $response->id;
+        $user->name = $response->name;
+        $user->firstName = $response->first_name;
+        $user->lastName = $response->last_name;
+        $user->email = isset($response->emails->preferred) ? $response->emails->preferred : null;
+        $user->imageUrl = $imageHeaders['Location'];
+        $user->urls = $response->link.'/cid-'.$response->id;
+
+        return $user;
+    }
+}