convert-ly 1.6->2.0 bug

[Erik Sandberg]

Hi,

I'm in the process of converting all my notes to the new 2.0 format (which 
looks great, btw). Found 2 bugs in the convert-ly script so far:

Given the following  perfectly valid 1.6.0 file:
\version "1.6.0"
x=\notes {c8 [<d d'> e e]}
the following, very illegal 2.0.0 output is created:

\version "1.9.8"


x=\notes {c8 <d d'>> >> e[ e]}

while I'd expect

\version "1.9.8"


x=\notes {c8 <d d'>[ e e]}

Two bugs:
- "> >>" is added from nowhere after the chord.
- The beaming is not translated correctly.

Thanks,
Erik