Added Milky Way skybox, 2D markers, added branding

-New ESA Milky Way skybox will need some galactic alignment assistance
from an expert. ;)
-Added Space Foundation and Away3D logo
-Looking into Yale Bright Star Catalog generated alternative for more
kiosk bling (not set in stone yet)
-New 2D markers, still an early work-in-progress
-Still need to hide line/markers once they hit the edge/back of globe.
-There's something going on with the line break format that is not
showing changes properly on Github - will work that out soon as well