Use getPath for error message as it is more detailed
Updated warning messages
Added support for cubemap asset
Fixed skybox.
Merge pull request #84 from guycalledfrank/graphics-fix

Graphics fix
Fixed specularAA trying to work without normal map.
Merge pull request #85 from guycalledfrank/graphics-fix

Fixed specularAA trying to work without normal map.
Cache filter/address lookup arrays.
pc.gfx.ShaderInputType -> pc.UNIFORMTYPE_
Remove WebGL validation since browsers have good support for this now.
Add use strict to graphics API files.
[FIX] JSlint warnings.
Simplify checks for undefined.
[FIX] Filter lookup typo.
Fix global var undefined check.
Revert changes to checking whether Ammo is undefined.
Remove called to enableValidation.
Optimize out a call to getMotionState
Merge branch 'master' of https://github.com/playcanvas/engine
[FIX] Picking now works for transparent and/or depth write disabled meshes.