Improved ocean rendering

We've improved the way the ocean is rendered, making the area around the horizon look more natural.
*Excluding the Tanegashima Space Center and the Uchinoura Space Center (we will address this in the future)
Improved camera behavior during stage separation

During stage separation, the camera now smoothly follows and centers on the upper stage.
Improved lunar orbit calculation

The Moon's orbit now reproduces apsidal precession (precession of perigee) and regression of the ascending node, so the lunar orbit evolves more realistically over long periods of time.
Performance improvements
We've reviewed how things are processed and improved the frame rate. Results vary by system, but we achieved roughly a 50% improvement. Our investigation showed that CPU processing was a bottleneck, so we'll continue working on further performance improvements.
Bug fixes
Fixed an issue where contract details could appear duplicated multiple times immediately after accepting a contract.
