rss-email 0.3.0

Hugo Osvaldo Barrera (1):
      readme: DATABASE_URL needs to be a valid URL

witcher (6):
      Update mailing list in README.md
      Add `contrib` with `pre-commit` git hook
      Acquire author/version info from Cargo.toml
      Add Atom support
      Remove feedurl and author from database
      Send E-Mails asynchronously