Added graphics for repeat one button, added repeat functionality to the UI.
Added delayed UI hiding, fade-ins/fade-outs and cursor hiding.
Added a spectroscope.
Reworked the hide UI policy. Now hides only after mouse exits UI or on full screen.
Merge branch 'feature/UI_commands' into develop
Extracted spectroscope to its own method, fixed javadoc, fixed correct version number.
Merge branch 'release/0.7'