use client?s mimetype as fallback for uploads

www/analytics/vendor/composer/autoload_namespaces.php

@@ -0,0 +1,12 @@
+<?php
+
+// autoload_namespaces.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
+    'Twig_' => array($vendorDir . '/twig/twig/lib'),
+    'Symfony\\Component\\Console\\' => array($vendorDir . '/symfony/console'),
+    'JShrink' => array($vendorDir . '/tedivm/jshrink/src'),
+);