Change public to open.

[onato]

I'm using Carthage, so the ImageViewer code is inside a framework. In ItemBaseController.swift many things are implicitly or explicitly only public, so I can't override or access them.

Is there any reason you wish to prevent overriding properties and methods in this class?

Specifically, I am overriding or accessing fetchImage(), scrollView, itemView, activityIndicatorView. In order to do so, I need to change these from public to open.

I can submit a pull request, but I wanted to get your thoughts first.

[RuiAAPeres]

I don't see a problem why not. Please send a PR.