feature request: better chord tremolo with whole notes

[Pedro Kroger]

How about having better support for chord tremolos when whole notes
are involved? In the example bellow, not only the beams in the first
measure should be placed bellow the noteheads, but they should be also
more inclined, like in the second measure. Any changes to see that in
2.1? :-)

\score {
  \notes \context Voice \relative c' {
      \clef "bass"
      \repeat "tremolo" 16 {g32 e32}
      \repeat "tremolo" 4 {g32 e32} r4 r2
  }
}

Pedro