v1.16.0

• signal_sync:
  • simplified handling race condition
  • can now align by dragging gaze signal instead of point on middle of plot
  • can now align gaze signal using arrow keys
• added dependency to ensure ffmpeg binaries are always available on all supported platforms
• added method for getting video timestamps using ffprobe
• no longer transcoding avi and mkv scene videos to mp4 during import, no longer needed with new timestamp getting method
• add class to export a scene video with overlaid gaze marker
• added fixation_classification.from_plane_gaze() for running fixation classification on data projected to a plane using I2MC
• moved functionality from glassesValidator into glassesTools.validation so it can be more easily reused. As part of this move, also reworked the logic and added some small bug fixes
• small crashing fixes