The rottags key alone now toggles hog tags; preecise+rottags is used to cycle tags I figured that the toggling hog tags on and off is a bit more important than changing the tag types, because you sometimes run into a hog whose tags block your view, so a 1-key press is helpful. On the other hand, you probably only want to changing the tag types in the game once (if at all).

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.