Renderer fixes

Beginnings of a WC4 loader for ThreeJS

Basic WC4 ship viewing works. Textures missing...

- WC4 ship rendering works, yay!

load based on url extension if parameters has no extension. Split key based on uri components and parse json

Updated example JSON url on iframe.html

- Corrected orientation of WC4 Ships to match the other formats.
- Camera distance is now derived from the object bounding sphere.

- Filtered out lower-level faces

refactor