Adding 3D support

I'm currently working on a new update that adds 3D support for cables.

Although cablese were displayed using SpriteRenderers that could already be placed in a 3D environment, that was with some limitations (editor handles didn't work properly and rendering was not generally meant for 3D).

The new update (1.1.0) will fix this. I'm currently working on it and I plan to release it this or next week.