Update for ReactiveCocoa 6.0, Swift 3.2

[iv-mexx]

Hi,

This is an update to use this project with ReactiveCocoa 6.0 and Swift 3.2.

I have just gotten everything to work with iOS (macOS not yet tested) and have not bothered to clean everything up right now, but I thought I'd create this Pull Request right away to see if there is even interest to revive this project.

Just let me know :)

The only relevant code changes are in

• Animation.swift
• View.swift

Everything else is just dependencies...

Also, I've included a small Demo Project