Merge pull request #1000 from github/update-1455062912

Author: hubot

nanoc.yaml

@@ -12,7 +12,8 @@ pipeline_config:
   asset_root: https://a248.e.akamai.net/assets.github.com/images/icons
 
 versions:
-  - &latest_enterprise_version 2.4
+  - &latest_enterprise_version 2.5
+  - 2.4
   - 2.3
   - 2.2
   - 2.1