Fixed remaining ship speeds

- Updated all speeds in SpawnShip and RespawnShip in GameType.cpp
- Updated Ship::die() to use respawnShip function
- Moved some functionality from Ship::die to GameType::RespawnShip
Fixed drone flight to work with deltaTime

- Also expanded arena to facilitate testing
- Made minor changes in Render.cpp to show debug circles
Fixed projectiles to work with deltaTime
Updated TODO.txt