Fix color underrun. I forgot that temporarily there are entities with negative health.
Merge branch 'master' into starter-testing
Implement reset button, enable visual feedback for sliders. So far Parameters have only been changed via the JSlider, so I had to add a mechanism that the Parameter can update the Slider AND vice-versa WITHOUT deadlocking each other (for example: Pause influences SIMULATION_SPEED).
Make initial food, wall, population mutable (reset button available)
Fixed keybindings by manual workaround.
Clean up code, introduce Field.reset() instead of copypaste.
Avoid creating GUI on a non-Swing thread. Force building EVERY part of the GUI on the EDT.