Refactor graphics API
Update camera component
Add timer
Reset timer
Add primitive command
Minor update particle system
Move to internal namespace
Update asset loader context
Add ParticleSystem::IsAlive
Change anim graph json format
Implement crossfade animation
Refactor graphics resource constructors
Fix game editor
Refactor skinned mesh renderable
Refactor animation classes
Add screen quad
Fix glsl2embedded script
Add image effects
Fix runtime tests