Ant 'bounces' off of walls correctly in every direction
DRY-cleaned up tests
destinationDirection updated accordingly, but Ants' state must be changed to Some(Direction)
Javascript translates gamefield-coordinates to ui-coordinates correctly
Ant updates its state after bouncing off a wall.

fixed tests: evil bug found: when using Implicit sender, you can send messages implicitly. When the TestActorRef returns a message to you, and you don't consume it in one testcase, but expect a message of that type in another testcase, the response-message of the first testcase will be the message that arrives to the 2nd testcase.
Drawing enhanced. Bounce-off has some hickups.

The y-Axis had to be inverted being offset.

Need to check the logs for bounce-off-hickups and try to create a testcase out of it.
logging refined (using SLF4J) with LogBack
Layout switched to bootstrap-grid