Updated Sky Map

I've updated the Sky Map to include all the astronomy videos on one map.

I've also made a couple of other design changes. You can now navigate to the different videos by clicking on the thumbnail images at the bottom of the map. It is also possible to remove the video from the map by clicking on the 'video layer' button (just click it again to bring the video back).

The videos can be controlled via the buttons positioned at the right of the screen.