tallyard v0.3.1

Doc updates and dependency bumps

David Florness (13):
      Fix clone URL in README
      Bump dependencies
      Delete old Nonce implementation
      Remove useless comment
      We don't need this return value to be named
      Set Matrix device display name to something reasonable
      tallyard.xyz: use symbolic Matrix room link
      tallyard.xyz: add links to mailing list and issue tracker
      tallyard.xyz: remove link to presentation in navigation links
      Remove TODO.org
      tallyard.xyz: revamp Contributing and Future Work sections with lists
      README: fix grammar
      README: update install-from-source instructions to use tarball