Move src/ts/tests/ex1.c to src/ts/event/tests/ex1.c
Move src/ts/tests/ex16.c to src/ts/event/tests/ex16.c
Move src/ts/tests/ex22.c to src/ts/tutorials/ex32.c, as it's not a test.

Fix the bouncing ball examples src/ts/tutorials/ex40.c and ex44.c
to cleanly terminate on reaching M bounces.