More Realistic Skies: Astrocraft Addon

this is the first test of the bigger update mentioned, there will probably be bugs and there are missing features, 1. added variable inclination, 2. added variable eccentricity, 3. added currently useless "Mass" in config, 4. added parallax (will scale with Diameter scale but you have to add @surface afte rthe planet name in observer location), 5. added the sun's anelemma (day length will slightly vary thorughout the year due to the earth's eccentricity), 6. rewrote astrocraft's eclipse shadow rendering (currently work in progress and parallax doesn't work with it), 7. fixed axial tilt bug (previously the axial tilt was slightly off of the exact value due to a percission error), 8. fixed my confusion between axial precession and axial tilt variation, 9. removed "Horizon color" (it was broken), 10. removed forest fires (they were broken and I decided I didn't want them).