Outdated Celestial Creator 1.1.0

Updated to the latest version of the GR mod, along with some improvements and fixes:

• Saturn has its own preview model to account for ring placements
• Saturn's rings are also accomodated for when determining whether it can fit in a gap between orbits
• Adjusted necessary textures from latest GR mod update
• Fixed an issue where creating a new celestial in the same position as one just deleted was being prevented
• Prevented stars orbiting a black hole allowing the ability to have planets orbiting them (not yet implemented)
• Added trail preview for linearly pathed celestials

The new celestial type: unstable, is not yet implemented here as I need to rearrange the design a little bit to fit all the information on 1366x768 screens