added some rules we follow but dont check yet

.php_cs

@@ -1,5 +1,15 @@
 <?php
 
+$header = <<<EOF
+This file is part of Composer.
+
+(c) Nils Adermann <naderman@naderman.de>
+    Jordi Boggiano <j.boggiano@seld.be>
+
+For the full copyright and license information, please view the LICENSE
+file that was distributed with this source code.
+EOF;
+
 $finder = Symfony\CS\Finder\DefaultFinder::create()
     ->files()
     ->name('*.php')
@@ -15,9 +25,14 @@ return Symfony\CS\Config\Config::create()
         '@PSR2' => true,
         'duplicate_semicolon' => true,
         'extra_empty_lines' => true,
+        'header_comment' => array('header' => $header),
         'include' => true,
+        'long_array_syntax' => true,
+        'method_separation' => true,
         'multiline_array_trailing_comma' => true,
         'namespace_no_leading_whitespace' => true,
+        'no_blank_lines_after_class_opening' => true,
+        'no_empty_lines_after_phpdocs' => true,
         'object_operator' => true,
         'operators_spaces' => true,
         'phpdoc_align' => true,
@@ -30,7 +45,10 @@ return Symfony\CS\Config\Config::create()
         'phpdoc_type_to_var' => true,
         'psr0' => true,
         'return' => true,
+        'remove_leading_slash_use' => true,
+        'remove_lines_between_uses' => true,
         'single_array_no_trailing_comma' => true,
+        'single_blank_line_before_namespace' => true,
         'spaces_cast' => true,
         'standardize_not_equal' => true,
         'ternary_spaces' => true,