Make "Get" and "Set" an IDLdoc keyword like "GetProperty" and "SetProperty"

[ennosigaeus]

We have a huge legacy IDL library where most objects have been written with "get" and "set" as accessors and mutators. To stay consistent with that notation, it would be very helpful if class::get and class::set would be treated like class::GetProperty and class::SetProperty, i.e. have IDLdoc create a properties section.