began torus...
Merge branch 'master' of https://github.com/kmwhelan93/ray-tracing.git
torus intersection...
Merge branch 'master' of https://github.com/kmwhelan93/ray-tracing.git
torus normal...
Merge branch 'master' of https://github.com/kmwhelan93/ray-tracing.git
finished Torus class...almost...