================
* Improved back reference access in Config object by allowing variable references
without requiring a prefix of `default` or the environment name. The resolution
order is current environment and then default.
For example, the following config will resolve `login_url` as **http://mysite.com/login**
and `profile_url` as **http://mysite.com/profile/prod_user** respectively, when `holmium.environment`
is set to **production**
.. code-block:: python
config = { "default" : {
"login_url" : "{{url}}/login"
, "profile_url":"{{url}}/profiles/{{username}}"}
, "production": {
"url": "http://mysite.com"
, "username":"prod_user"}
}