Cross Staff Beaming Part 3

[arshiacont]

Fresh new Unit test:

{[ \staff<1>  
   \clef<"g2"> \key<-5> \meter<"C"> 
   \staff<2> \stemsUp \slurBegin:1<curve="down"> \beamBegin:1 \beamBegin:2 a&0/16 \staff<1> e&1/16 g&/16 \staff<2> g&0/16 \slurEnd:1  \beamEnd:2 \beamEnd:1 
  \slurBegin:1<curve="down"> \beamBegin:1 \beamBegin:2 a&/16 \staff<1> d&1/16 f/16 \staff<2> f0/16 \slurEnd:1 \beamEnd:2 \beamEnd:1 
   \slurBegin:1<curve="down"> \beamBegin:1 \beamBegin:2 a&/16 \staff<1> d&1/16 f/16 \staff<2> f0/16 \slurEnd:1 \beamEnd:2 \beamEnd:1 
   \slurBegin:1<curve="down"> \beamBegin:1 \beamBegin:2 a&/16 \staff<1> d&1/16 f/16 \staff<2> f0/16 \slurEnd:1 \beamEnd:2 \beamEnd:1 \staff<1> \bar  ]
 , 
[ \staff<2> \clef<"f4"> \key<-5> {a&-2/1, a&-1/1} \bar ]
  }

leading to:

Expected similar to:

[dfober]

partial fix: beaming is now correct but the slurs are a bit ugly and there is still the missing clefs and signatures on first staff (a headache!). (pushed to github)

[dfober]

fully fixed and pushed