Locations should be an array

!!! BREAKING CHANGE

Locations and try_files are made into an array.
Configuration files will need to be adjusted.

```
    locations:
      - name: /
        try_files:
          - $uri
          - $uri/
          - /index.html
      - name: /images/
        try_files:
          - $uri
          - $uri/
          - /index.html
```