Describe should also compile and describe array's rules

[Marsup]

Considering the following code :

> var Joi = require('joi');
> var schema = Joi.array().includes(Joi.number());
> schema.describe().rules[0];
{ name: 'includes',
  arg:
   [ { isJoi: true,
       _type: 'number',
       _settings: null,
       _tests: [Object],
       _dependencies: [],
       _mutators: [],
       _valids: [Object],
       _invalids: [Object],
       _flags: [Object],
       _description: null,
       _notes: [],
       _tags: [],
       _inner: null } ] }

I think the rules should contain described objects as well, not raw Joi objects.