Add Squadrons of Four
Make Apparitions Shoot Bullets
Make Bullets Smaller
Add Pluggable Bullet Strategies
Make RotatingCross Live Up to Its Name
Rename Private player Variable on FlightState
Add Bullet Group to FlightState
Add Function to Smoothly Introduce a New Squadron
Move Bullets Above Player
Revert All Recent Changes to Player

Reverts the player to their state in 8fc81a6.
Start Player at Correct Location
Make Conveyor Endpoints Public
Reduce Player Top Speed
Add a Second 4-Apparition Squadron
Add 5-Apparition Squadron
Add Squadron Container to FlightState

Also separates instantiation and addition to the state.
Remove Test Conveyor

Don't worry, there will be more conveyors soon.
Add Random Squadron Spawner (for Testing)
Tiny introduce() Optimization
Make All Squadron Formations Equally Likely