Non quoted names are not parsed

According to https://developer.valvesoftware.com/wiki/KeyValues: `It has 3 control characters {, } and ". Names and values may be quoted or not.`.

This means:

```
"ParentKey1"
{
    ValueKey1   "1"
}
```

should result in 

```
array(1) {
  'ParentKey1' =>
  array(1) {
    'ValueKey1' =>
    string(1) "1"
  }
}
```

but results in 

```
array(1) {
  'ParentKey1' =>
  array(0) {
  }
}
```
