Adding portal link geometry

Adding shader set to exported objects
Setting the needsUpdate flags after setting all the buffers
Adding in a missing step for the index construction
adding u_cameraFwd to default uniforms in the engine
Making the sandbox a little bigger

Adding in resonator link geometry
Updating the engine default for u_color1 to the neutral xm color
Adding ability to load raw shaders
Updating sandbox to use resonator links
Improving sandbox functionality
Adding portal links to the sandbox
Updating definition of shield mesh

Was missing transparency flag
Adding a bunch more assets
- Shards, glow textures and objects, ornaments, etc
Adding ornament models