cabal init
Added stub main file.
apply hs project
Blank screen.
Command-line options.
Data vector and rendering.
Stubbed out fish movement.
Shark moves (death, eating, death).
Added options for the viewport height, width, and zoom.
Fixed scaling issue.
Formatting and linting.
Added an option for speed.
Added options for running.
Tried to clarify movement.
Debugging output.
Shark energy and fish age determines the visual intensity.
Add a timestamp to outputs.
Fixing bugs and writing output.

* Summary output each generation.
* Fish need to still exist before they can move.
* Entities need to update their age and energy, even if they don't move.
Don't output so much.
Linting