Added frp doodles.
Experimenting with FRP to avoid explicit state.

I have no idea whether the approach used in this test is actually any good.
Added two short frp experiments.
Made examples easier to read.
Use RecordWildCards!
Toying with my sandbox codes.
Moved toy examples to sandbox.
Moved sources to src/.
Doodling.
FRP test: Timer with reset.
Preparations for making reactive snake.
Reactive game is taking form. Slowly.

It this works out, it will make for a much nicer game! I'm starting to like
frp.
Snake moves again!
Working reactive snake game.
Fix inconsistent keys & "thin" snake helpers.
Working game!
Rounded stomach content.
Cleanup + name change: hisss -> hiss.