LilyPond 2.13.26 released

[Graham Percival]

We are happy to announce the release of LilyPond 2.13.26. This release
contains the usual number of bugfixes. However, a number of critical
issues still remain, so this release is intended for developers only.

In addition, we have now caught up on our backlog of bugs.  If you are
aware of any problems that are not fixed in 2.13.26 and have not been
added to our tracker, please report the bug again by following the
guidelines here:
    http://lilypond.org/website/bug-reports.html
Please note that an email to lilypond-user or lilypond-devel does
*not* constitute a proper bug report.

Cheers,
- Graham