Crashes on iOS8 (when build with Xcode 8 / Swift 3)

[hohl]

Crash when using CIContext(options:) in CIImageExtensions.swift line 21. Seems to be an issue of Xcode 8 which is having issues translating the Swift 3 options: notation into contextWithOptions: (instead of initWithOptions). Writing a second helper extension in Obj-C would be a workaround.

[hohl]

More details: https://openradar.appspot.com/28200846