Pajk/apipie-rails — pull request #189 by mtparet (2014-01-24 14:56:20+00:00)
Title: Add nested validator to validate nested children

The goal of this validator is to validate each element inside of the array.

It enable to validate this kind of parameters:
```ruby
{
user_id: 5,
comments: [
{
name: 'name of comment1'
comment: 'blabla1'
},
{
name: 'name of comment2'
comment: 'blabla2'
}
]
}
```

The definition of the parameters will be:

```ruby
param :user_id, Integer
param :comments, :nested do
param :comment, String
end
```

I think this validator could be useful for many people and so should be included by default in the gem.

Any remarks ?