Actor editing

[blacktwin]

Addressing Issue #462

addActor() and removeActor() methods are now added to video.Movie and video.Show.

[JonnyWong16]

Question: Does adding an actor with the same name that already exists in a different movie use the same role id and filter?

[blacktwin]

Question: Does adding an actor with the same name that already exists in a different movie use the same role id and filter?

Yes.

[blacktwin]

addActor() can also be used to edit any existing actor's thumb or role. The name is the only required argument to make changes. name and whatever other attribute someone would want to change.

index argument is an assumption on my part. I was able to create a new actor and their position in the webUI was not first. Not 100% if it was as commanded or if Plex ordered for me. More testing for the index is needed.