Sort order of types in the README injection

I’m able to control the sort order of the types when I build HTML docs. However, I can't figure out how to specify the same order for the `readme` command.

For example,

```shell
documentation build *.js --config .docs.json --format html --output docs/
```

orders as expected given `.docs.json`

```json
{
"toc": [ … ]
}
```

However,

```shell
documentation readme *.js --config .docs.json --section Usage
```

does not seem to use the `--config` parameter. (Although, it also doesn’t complain about its existence.)

documentation: 4.0.0-beta14
node: v6.5.0
npm: 3.10.3
macOS: 10.11.6