Release v0.5.0

This release contains most enhancements that were in the pipe, and is ready for serious use. A few open discussions points exist though, and this is why this release is marked as a pre-release.

API documentation does exist and is complete.

This version is available on PyPI:

pip install ld

Testing could still be improved (see the test-related open issues), but the unit tests at this point cover the major distros and are fairly complete.