MB3 Metadata

Only producing series.xml so far...
Could do it a couple ways, depending on complexity.

One liner:
 `tvShow.Add(new XElement("genres", genres.Select(genre => new XElement("genre", genre))));`

```
var persons   = new List<XElement>();

foreach (var person in series.Actors)
{
    //Will need to make the proper person XElement
    persons.Add(new XElement("Person", person));
}
```