middleman/middleman — pull request #836 by tricknotes (2013-03-23 08:22:38+00:00)
Title: Support directory name as a data key

I want to use directory to group some data.

For example:
```
$ tree
.
└─ data
└── example
├── test1.yml
└── test2.yml
```

At this time, I want to access example data through `data.example`.

Currently, this case could be made by using `example.yml` with keys [test1, test2].
But when each data is too large, it is difficult to treat as one file.