Orbital Survey Plus

- Adjustments have been made to make OSP compatible with alternate solar system mods, including Real Solar System
- Scan grid size and minimum/maximum scan altitudes will adjust based on largest and smallest scannable planet
- Scaling is based on stock parameters, so users with stock KSP solar system will not be affected
- Added some caching behavior to optimize performance
- Optimized coverage percentage calculation
- Made changes to try to reduce a "zipper effect" on straight vertical and horizontal scan lines
- Made requested change to science transmission code for clarity to other mods
- Fixed several small UI bugs