Remove threejs dependency

Nin supplies threejs, so threejs does not need explicit mentioning.
Merge pull request #1 from ninjadev/pedantic-fix

Remove threejs dependency
Update music (and add ogg)
Add skybox
Merge pull request #12 from ninjadev/skybox

Add skybox
Revert "Add skybox"
Merge pull request #13 from ninjadev/revert-12-skybox

Revert "Add skybox"
Set up DesertLayer.

Incorporates Skybox into desert, and thereby removes skybox issues.
Merge pull request #14 from ninjadev/desert-layer

Set up DesertLayer.
Add missing skybox files
Merge pull request #16 from ninjadev/add-missing-skybox-files

Add missing skybox files
Add three planet textures
Add dandelion seed to desert layer
Merge pull request #19 from ninjadev/dandelion-seed

Add dandelion seed to desert layer
Update desert ground geometries
Add space layer, glow
Merge pull request #23 from ninjadev/space

Space
Merge pull request #22 from ninjadev/desert-hexagons

Update desert ground geometries
First draft to a heat haze shader
Adding uniforms to controll the heat haze shader