Pupil Capture and Player release

This update contains bug fixes and small improvements.

But most importantly from now on we have proper MacOS and Linux (Debian) installers.

Mac

Pupil Capture and Pupil Player come in .dmg files. The applications are installed in Applications. User settings and recordings live in the user directory.

Linux

Pupil Capture and Pupil Player are installed via .deb bundles. They usually open in the OS software center and can be installed there.
The application is installed to /opt
We create Desktop entries in /usr/share/applicaitons
We create a terminal shortcut in 'usr/bin'
Settings and recording live in ~/