Add configuration for php-cs-fixer

Author: sebastianbergmann

.php_cs

@@ -0,0 +1,43 @@
+<?php
+$finder = Symfony\CS\Finder\DefaultFinder::create()
+    ->files()
+    ->in('src')
+    ->in('tests')
+    ->name('*.php');
+
+return Symfony\CS\Config\Config::create()
+    ->level(\Symfony\CS\FixerInterface::NONE_LEVEL)
+    ->fixers(
+        array(
+            'duplicate_semicolon',
+            'empty_return',
+            'extra_empty_lines',
+            'join_function',
+            'list_commas',
+            'no_blank_lines_after_class_opening',
+            'no_empty_lines_after_phpdocs',
+            'phpdoc_indent',
+            'phpdoc_no_access',
+            'phpdoc_no_empty_return',
+            'phpdoc_no_package',
+            'phpdoc_params',
+            'phpdoc_scalar',
+            'phpdoc_to_comment',
+            'phpdoc_trim',
+            'return',
+            'self_accessor',
+            'single_quote',
+            'spaces_before_semicolon',
+            'spaces_cast',
+            'ternary_spaces',
+            'trim_array_spaces',
+            'unused_use',
+            'whitespacy_lines',
+            'align_double_arrow',
+            'align_equals',
+            'concat_with_spaces',
+            'short_array_syntax'
+        )
+    )
+    ->finder($finder);
+