ties in 1.5.30

[Heikki Johannes Junes]

Ties work now quite well. Here is results from a quick test..

\score { 
    \notes \transpose c'''
    \context Staff {
        \context Voice = i {
            <e4>~<e>~<e cis a>~<e c>
            e4~e~<e cis a>~<e c>
        }
    }
%    \midi{}
}

When midi-field is commented, PS-output works the right way! But,
then there's no midi-output.

When midi-field is not commented, only midi-output is produced (along
with some error messsages). But, then there's no dvi- or ps-output.

In midi:
  <e4>~<e>~<e cis a>~<e c>
produces first two e4-notes and then one e2-note, while
  e4~e~<e cis a>~<e c>
produces one e1-note. Seems like the latter works already the right way!

Happily beta-testing,
      Heikki Junes