Jake Bromberg

`git clone https://github.com/CodaFi/CFIFrostedOverlayView --recursive` Then build: `~/Desktop/CFIFrostedOverlayView/CFIFrostedOverlayView/CFIFrostedOverlayView.m:12:9: fatal error: 'GPUImage.h' file not found`

`user_osc_param` does not expose velocity data

3

**Is your feature request related to a problem? Please describe.** I would like to modulate my oscillators based on velocity input. Currently this is unavailable via the `user_osc_param`, which would...

These changes migrate the code base to Swift 4. Also, I introduce an `@objc` annotation in the `PlaybackButton.swift` file that the migrator missed, and also fixes the animation. Re: #1