• engine: LiSPSM is now a user settable option
• engine: get the morph target buffer to the given primitive
• Java: Fix TransformManager.getChildren()
• Metal: newer devices are no longer limited to 16 samplers per Material.
• gltfio: fix interpretation of occlusion strength
• engine: minsdk is now 21 instead of 19. This allows the use of OpenGL ES 3.1
• Vulkan: fix black screen regression