Feature Request: Support for fingering position override on single polyphonic notes

[Javier Ruiz-Alma]

Lilypond ignores fingering position command for single notes on polyphonic
music, while allowing the desired behaviour when chord notation is used.
Report from 2004:
http://lists.gnu.org/archive/html/lilypond-user/2004-08/msg00300.html

\version "2.16.1"
{
  % fingering position command ignored on single polyphonic notes
  % yet works with chord notation
  << {s2} \\ { c''^5 <c''^5> }>>
}

This limitation makes for a lot of extra typing and yields difficult to
read/maintain lilypond code when typesetting fingered polyphonic scores.