added skybox-formatted Mars images generated from high resolution ECE, allowing for better north and south poles, much higher detail
Mars now uses SkyboxMaterial, resized skybox images to max 1024x1024, deleted unsupported normal maps, updated orientation of current POI
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
Basic line show/hide with 2D marker overlay works now, will merge with master branch