Big Globe 5.0.3

Increased LOD rendering speed by about 20%-ish (results may vary).
Fixed log spam and out-of-memory conditions when LOD mesh builder encounters an exception.
LOD renderer is now compatible with Immersive Portals.
Fancy waypoint renderer now disables itself when Immersive Portals is installed.
- Non-fancy waypoint renderer remains active.
- I might look into getting this to work better some other time.
Fixed Create blocks showing up as fog-colored when LOD rendering is active.