Add CSP sandbox

Fixes https://github.com/PrivateBin/PrivateBin/issues/168

Alos needed to run some Composer stuff, no idea why my diff was different.

vendor/composer/autoload_static.php

@@ -15,6 +15,10 @@ class ComposerStaticInitDontChange
         array (
             'PrivateBin\\' => 11,
         ),
+        'C' => 
+        array (
+            'CodeClimate\\PhpTestReporter\\' => 28,
+        ),
     );
 
     public static $prefixDirsPsr4 = array (
@@ -22,6 +26,10 @@ class ComposerStaticInitDontChange
         array (
             0 => __DIR__ . '/../..' . '/lib',
         ),
+        'CodeClimate\\PhpTestReporter\\' => 
+        array (
+            0 => __DIR__ . '/..' . '/codeclimate/php-test-reporter/src',
+        ),
     );
 
     public static $prefixesPsr0 = array (