Figured Bass support

[Richard Shann]

hi,

The example given in the manual for a figured bass seems to be missing a
\notes directive - if I put it inside a \score {} thus

\score {
<
\context FiguredBass
  \figures {
   <_! 3+ 5- >4
   < [4 6] 8 >
  }
\context Voice { c4 g8 }
>
\paper {
}
}

then I get an error
warning: Junking request: `Lyric_req': \context Voice { c4 etc...

When I put in the missing \notes directive I get a message
programming error: No StaffSpacing wishes found (Continuing; cross thumbs)

This doesn't always happen depending on the relative lengths of the 
parts I think. Any suggestions for eliminating this would be welcome, 
meanwhile here is a revised example with the \notes and that is more 
realistic
<
\context Voice \notes { \clef bass dis4  c d ais}

\context FiguredBass
  \figures {
   < 6 >4 < 7 >8 < 6+ [_!] >
   < 6 >4 <6 5 [3+] >
  }

>

By the way, I notice that the character $ is allowed after the \ in 
lilypond, is this an old feature - it does not seem to be used for 
anything? I can't see a reference to it in the ChangeLog.  (It is being 
output by denemo, but I don't think it means anything).

Richard Shann