Fixing issue with FormData not being sent

closes #53

lib/defaults.js

@@ -9,6 +9,9 @@ var DEFAULT_CONTENT_TYPE = {
 
 module.exports = {
   transformRequest: [function (data, headers) {
+    if(utils.isFormData(data)) {
+      return data;
+    }
     if (utils.isArrayBuffer(data)) {
       return data;
     }