Export settings for Paths and Export transparent objects

[MegaMech]

Built from #34

Provide users the following options

• Choose Clip type for the mesh (no collision, wall, double wall, etc.)
• Choose render layer (opaque, transparet, etc.)
• Transparent objects output as normal objects with positions to allow z-sorting
• Export Path as path 1,2,3,4 or vehicle.

Change

• Add back material presets