Cleanup of repositories and preparation for Milky Way v0.4 release

We are currently cleaning our server from all old and outdated packages as our next major release Milky Way v0.4 has been in testing for a long period and so will become the stable branch. Expected release date is March 1st.

This version of Hyperbola GNU/Linux-libre most likely needs a complete reinstall as the changes are so drastic, especifically what regards to D-Bus. Please note: It is no longer recommended to migrate from any other Arch-based distro. After this time v0.4 will become the new stable.