powerup fixes
only render powerups if they are live
bring back the soundtrack
Added new track and fixed trackpath so it doesn't need to invert z anymore
Merge branch 'master' into lighting
wwod now follows the leading player
serialize leaderboard, (amy) fix initial selection
Merge pull request #24 from 5-second-rule/zach-polish

Zach polish
instant death
Merge pull request #25 from 5-second-rule/die-die-die

instant death
saturationLightness
merged from master