README.md in nightcrawler_swift-0.9.0 vs README.md in nightcrawler_swift-0.10.0

@@ -75,10 +75,13 @@
 # default: nil
 config.nightcrawler_swift.ssl_ca_file = "ca_certificate.pem"
 
 #default: nil
 config.nightcrawler_swift.ssl_version = "SSLv23"
+
+#default: {}
+config.nightcrawler_swift.custom_headers = {custom_header: 'custom_value'}
 ```
 
 By default it will use ```Rails.logger``` as logger, to change that use a different logger in configurations, like:
 
 ```ruby
@@ -101,10 +104,14 @@
 
 > max_retry_time
 
 Maximum delay in seconds between each retry. The delay will start with 1s and will double for each retry until this value.
 
+> custom_headers
+
+Optional hash with header fields to be uploaded with the object.
+
 #### 2) Profit!
 
 ```sh
 $ rake nightcrawler_swift:rails:asset_sync
 ```
@@ -157,9 +164,12 @@
 ssl_client_key:
   OpenSSL::PKey::RSA.new(File.read("key.pem"), "passphrase, if any"),
 
 # default: nil
 ssl_ca_file: "ca_certificate.pem"
+
+# default: {}
+custom_headers: {custom_header: 'custom_value'}
 ```
 
 By default it will use ```Logger.new(STDOUT)``` as logger, to change that use:
 
 ```ruby