nicolaiarocci/eve — pull request #522 by jam0ral3s (2014-12-05 13:09:43+00:00)
Title: Added support for validation on field attribute with type list

I found that when trying to validate a field attribute with type list I get this error:
```
{
"_status": "ERR",
"_issues": {
"music_type": "value '[u'elem1', u'elem2']' must exist in resource 'types', field 'key'."
},
"_error": {
"message": "Insertion failure: 1 document(s) contain(s) error(s)",
"code": 400
}
}
```
I've added support for this type of field attribute.