• Make low and high gravity turn parameters tweakable in launch_rocket.to2
• Add circularize_orbit_pe to std-lib
• Ensure that orbit relative coordinates are in main bodies reference frame (#54)
• Use coordinate independent vectors to check ship alignment in exec_next_node
  • Also adding global_ship_is_facing helper to std::utils
• Fix struct type as type parameter issue (#55 + #56)
• Base the search interval of the intercept script on orbit period to make it more useful in interplanetary transitions