5.3.0

• Updated setGifFromURL by adding parameter customLoader: UIView? = nil, allowing for custom loader UIView.
  A typical use would be something like :

let loader = UIActivityIndicatorView.init(style: .white)
self.imageView.setGifFromURL(url, customLoader: loader)

• Updated setGifFromURL by adding parameter session: URLSession = URLSession.shared, allowing for custom URLSession.
• Added a basic caching system for remote GIFs
• Updated Demo project in order to demonstrate local GIFs and GIFs in a UITableView