Improve post list structure

[adriantoine]

For now when you want to render a post list, it looks like:

      <ul>
        {this.props.posts.edges.map(edge =>
          <li key={edge.node.meta.slug}>{edge.node.meta.title}</li>
        )}
      </ul>

and those edges, node long structures annoys me.

You should be able to iterate through an array this.props.bloql.posts and get each post there.
And for Post, parameters should be available in this.props.bloql.post not to pollute the normal props object, in case someone wants to pass a post prop, it shouldn't be overriden.