Update and change license information of Droplet sounds, now it's CC BY 3.0
Was previously labelled under license CC Sampling+ 1.0, which is
considered non-free by FSF, OSI and DFSG.
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.