Expand setup.py, add PyPI deploy tools * The debian build will now run a script that will, on a git tag push, use `twine` to upload MousikóFídi to PyPI. * .gitignore and clean targets updated to reflect new stuff. * dev requirements are also updated with new things for building and publishing. * A small shell script to check that 1) there's no local changes, and 2) it's a git tag commit. If both, then a package upload is performed.