Pupil Capture, Service and Player release

This release incorporates our latest round of improvements and bugfixes.

• Add support for MacOS 10.12 "Sierra"
• New normal fixation detector.
• Improved user interface for Pupil Remote settings.
• Implemented z-ordering of menus in Pupil Player.
• Added Icons for Thumb elements in Pupil Player.
• Added realtime fixation detector.
• Minor fixes.

We hope you find these new features useful and look forward to feedback!

Best,
The Pupil Dev Team