XIB support

[Gargo]

Is your feature request related to a problem? Please describe.
there are a lot of cases when you setup UIImageView inside xib file but your lib forbids that

Describe the solution you'd like
support xibs. Currently your lib fails on:

required public init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

Describe alternatives you've considered
Alternative libraries support that