Use negative lightsCount to disable lighting
Rename TestShader to DefaultShader and move to .shaders package, move Light and add direction and angle.
Set DefaultShader.ignoreUnimplemented to true by default for now.
Add ambient light
Update Light#equals
Minor doc changes
Add Light#type
Add GLES20 ambient, directional, point and spot lights.
Add specular to GLES20
Small shader fix
Don't use specular when lighting is not used.
More shader optimizations, still not happy about the performance....
Merge branch 'new3dapi' of https://github.com/libgdx/libgdx into new3dapi
Add blended
ModelInstance: only set transform if it's not null
Merge pull request #330 from xoppa/new3dapi

New3dapi, rename to .shaders.DefaultShader, move Light and add direction and angle