Provide comment syntax for responses

The files don't provide a way to comment the fields or even the whole file, this would ease development and documentation.

something like 

``` js
// this is a comment
{
  "key":"value",
  // another comment
  "keyTwo":"oneMoreValue"
}
```

should result in 

``` js
{ "key":"value", "keyTwo":"oneMoreValue" } 
```
