Semi-standardize usage of icons in many mission panels * Question mark: Decision / user input * Exclamation mark: Tutorial message / information * Hedgehog: Mission introduction * -amSkip: Mission failure * Star: Mission success / end of game

Directory for automated tests to test the engine.

Run `ctest` in the root directory of this repository to run all tests.
Run `ctest -R <test name>` to run only the test with the given name.

This requires you to have CMake.