keyboard controls for snappy
----------------------------

spacebar   - play/pause

f          - fullscreen/unfullscreen

esc        - close snappy
q          - close snappy

up         - seek 1 minute foward
down       - seek 1 minute back
left       - seek 10 seconds back
right      - seek 10 seconds foward

8          - mute/unmute
9          - turn volume up
0          - turn volume down

<          - play previous
>          - play next

c          - show/hide visual controls

v          - toggle subtitles
#          - cycle through available audio streams
_          - cycle through available video streams
j          - cycle through available subtitle streams

o          - display playback time/display time left

r          - rotate video

.          - frame step foward
,          - frame step backwards

-          - delay audio 50 milliseconds with respect to the video
+          - advance the audio 50 milliseconds with respect to the video

[          - decrease speed of playback 10%
]          - increase speed of playback 10%

