Fixed cyborg_visor_halo coloring the albedo entirely black

Fixed cyborg_visor_halo not using the _halo variant of cyborg_envmap_mask

Fixed cyborg_visor_halo using the wrong texture for $baseTexture

Added a secondary skin that's closely similar to Halo: Combat Evolved

Made various adjustments to the UV mesh, rigging, and smoothing groups

Placed armor lights closer to the model so they look less floaty

Fixed view model hands not holding weapons correctly