TODO
Playing with offscreen buffer drawing; GUI switches to play with sprite cache and such; more little refactorings to sprite drawing
Wire beams up to dat.GUI and a quick bugfix for untargeted beams stuck in a charge/discharge cycle
TODOs
Enable SpawnSystem to capture camera follow from ViewportSystem with a message
Simplify follow / camera logic; Make buffering standard without a switch; Refactor grid backdrop into its own method
First experiments with seeker missiles
Randomizing missile acquisition delay does cool things
More missile launcher placement tinkering
Adding trails to missiles; reworked missile launcher placement
Stop measuring missile loading for now