fixed https://github.com/readium/SDKLauncher-OSX/issues/16 video interactivity issues, was because of CSS 3D GPU acceleration in iframe rendering sequence (which is necessary for some EPUBs due to cropped images in UIWebView)
ensure 3D CSS acceleration setting is up to date (default value, which may not be provided by launcher app options)
Merge pull request #132 from readium/feature/video_CSS_3D_GPU_acceleration_FXL

video controls CSS 3D GPU acceleration (FXL)