Animation on OSX hangs

[wildthink]

The recently added CombinationAnimationGenerator.swift fails to compile for OSX.
Adding

#if os(OSX)
import AppKit
#else
import UIKit
#endif

fixes the build but the animation example in the OSX Example hangs.

[amarunko]

Hi, @wildthink, thanks, build fixed in the master branch. Also, you always can send fixes by pull request. We will investigate hangs.

[ystrot]

This issue fixed in the master branch and will be available in the 0.9.4 release.