More examples and documentation

hey everyone,

I am trying to adapt https://github.com/dherault/aquest to use schema.org ttl files
but I am not sure how to make that work. also printSchema just return:

```
"""An object with an ID"""
interface Node {
"""The id of the object."""
id: ID!
}

type Query {
"""Fetches an object given its ID"""
node(
"""The ID of an object"""
id: ID!
): Node
}
```

not sure if it is the correct output.