Format for anonymous hashes

Proposed solution to lack of anonymous hashes in toml mojombo/toml#50

```
[dependencies.#]
  [-]
  groupId    = "com.google.api-client"
  artifactId = "google-api-client"
  version    = "1.13.2-beta"
  [-]
  groupId    = "com.google.api-client"
  artifactId = "google-api-client-servlet"
  version    = "1.13.1-beta"
```

Makes for easy reading and parsing.

`[dependencies.#]` tells the parser to make the value for the key `dependencies` an empty array and just push any of the subsequent hashes to the array.

`[-]` Tells the parser to start building a hash that will be pushed into the previously defined array as soon as the next key is found