Precompute code

The following third party code is used in the Enlighten Precompute, which is embedded in the Unreal Engine editor.

• JAMA
• Intel Embree
• Intel Threading Building Blocks
• Targa handling

The following libraries are used in the Enlighten High Level Build System, which is embedded in the Unreal Engine editor.

• TinyXml
• TinyXPath
• stb_image_write