Unable to compile under Xcode 7 beta 5 and iOS 9 beta 5

[tomislav]

I'm getting this error when compiling with Xcode 7 beta 5 and iOS 9 beta 5 in DFImageView.m.

Nullability specifier 'nonnull' conflicts with existing specifier 'nullable'

- (nonnull instancetype)initWithCoder:(NSCoder *)decoder {
    if (self = [super initWithCoder:decoder]) {
        [self _commonInit];
    }
    return self;
}

[kean]

Hi, pull request would be nice, we don't use Xcode 7 yet.

[kean]

Done (see develop branch). Also resolves "Method override for the designated initializer of the superclass '-init' not found" warning by marking -init unavailable where necessary.

[kean]

Also disable ATS (app transport security) in demo project.