jamtur01/james_blog — pull request #1 by quiver (2014-10-25 08:08:32+00:00)
Title: suppress build warnings of jekyll 2.3

jekyll 2.3 changed yaml semantics, which introduces build warning for older configurations

```
$ sudo docker logs james_blog

Configuration file: /data/_config.yml
Source: /data
Destination: /var/www/html
Generating...
Build Warning: Layout 'nil' requested in atom.xml does not exist.
Build Warning: Layout 'nil' requested in rss.xml does not exist.
```
see jekyll/jekyll#2712 for details