Automorphism group of a PermutationGroup without GAP directly

[Trevor Karn]

Am I correctly understanding that there is currently no method to return the automorphism group of PermutationGroup without directly invoking GAP? I'm thinking something along the lines of the `AbelianGroupGap.aut()` method. It doesn't seem to bad to add, I just want to make sure I'm not missing something before opening a ticket.