Fix missing logo (sheesh)
Initial simple port - need to check for other modifications required
Add other simple changed files
If cannot connect to auth session, just start as an un-authenticated user.
Additional helper
Fix no orientation change with head track disabled
Port to Optifine U D1 - ensure VR Renderer matches EntityRenderer as closely as possible.
Port installer files to Optifine 1.6.4_HD_U_D1