Add revamped Volcano background.
Replaced stars to better match original design.
Replaced ground lava planes with stylised cracks.
Reworked distant mountains.
Removed extraneous images.
Add Nuncabola UFO ball.
Merge pull request #79 from Cheeseness/volcano-updates

Add revamped Volcano background.
Add details on options and some more tweaks
Merge pull request #80 from Cheeseness/nuncabola-ufo

Add Nuncabola UFO ball.
Add UFO ball

Added UFO ball. Minor tweaks to ball list.
Add UFO and Catseye balls.

Added UFO and Catseye balls.
Update all level shots
Merge branch 'master' of https://github.com/Neverball/neverball