Jovian Moons - Solar System Revamp

Replaces Europa's and Callisto's textures with FarGetaNik's textures, from their Celestia mod. Ganymede's texture is changed to a slightly more updated one with Juno data by supersean08. Only Io is left unchanged, but I suggest you use the required addon if you'd like. Incompatible with anything that changes the Jovian moons' entries in SolarSys.sc unless it specifically points to the corresponding new textures. Link to original Celestia mod Ganymede texture by supersean08 Do not ask me for planet textures. If you want planet textures done, learn Cubemap yourself.