2 new spritesheets !

Added 8x8 and 16x16 animations of earth (night version)

Added 8x8 and 16x16 animations of earth  (blending from day to night)

Bug fixes :

• Minor correction on the 'Earth (day)' spritesheet

Coming soon :

• Earth cloudy (animated)
• Other planets in rotating version (solar system asset pack 2.0)
• Other solar system moons
  • Jupiter moons (Io, Europe, Ganymede and Callisto)
  • Saturn moon (Titan)
  • Neptune moon (Triton)