Added device camera handler for setting and updating viewing camera from host
Renamed DeviceSceneImporter to DeviceSceneHandler
Added device reset
Fixed device scene handler interface.added deallocation func
Implemented findmindistanceintersection for device
Implemented simple ray tracing for the GPU.Just diffuse shading
Added device ray tracer handler
Implemented min distnace linear intersection search
Added device renderer
Added kernel invocations for raytracing
clean commit