README.md in heirloom-0.11.2 vs README.md in heirloom-0.12.0

@@ -38,9 +38,14 @@
 #   access_key: UPDATE_ME
 #   secret_key: UPDATE_ME
 #   metadata_region: us-west-1
 ```
 
+You can specify an alternate config file by setting "HEIRLOOM_CONFIG_FILE" 
+```
+export HEIRLOOM_CONFIG_FILE="~/special_config.yml"
+```
+
 Documentation
 -------------
 
 For more information, please view the [Heirloom Wiki](https://github.com/intuit/heirloom/wiki).