* [DEB] Run debug cases when called with the `--debug` command-line argument.
* [DOC] Added readme file.
* [COWSAY,SC] Explicit declaration of options.
* [COWSAY,EXT] Allow DCG values for the `eyes` and `tongue` options.
* [COWSAY,NEW] Added option for the parallel execution of multiple cow messages (waiting for the TTS of the previous message to complete).