Merge branch 'master' into translation

diff --combined Documentation/web/news-old.itexi
index a68b5cc8616ce18d87b5f50b1eccdac1d0444a35,b22d009ca8b1cebce045cdb83e1d71a6f0d91c39..8219c23c879518c552c9a9f2aa569af653813581
--- 1/Documentation/web/news-old.itexi
--- 2/Documentation/web/news-old.itexi
+++ b/Documentation/web/news-old.itexi
@@@ -26,6 -26,18 +26,18 @@@ NOTE
    * don't duplicate entries from news-new.itexi
  @end ignore
  
+ @newsItem
+ @subheading LilyPond 2.19.57 released  @emph{March 12, 2017}
+ 
+ We are happy to announce the release of LilyPond
+ 2.19.57.  This release includes a number of enhancements, and contains some
+ work in progress.  You will have access to the very latest features, but
+ some may be incomplete, and you may encounter bugs and crashes.  If you
+ require a stable version of LilyPond, we recommend using the 2.18
+ version.
+ 
+ @newsEnd
+ 
  @newsItem
  @subheading LilyPond 2.19.56 released  @emph{February 26, 2017}
  
@@@ -780,7 -792,7 +792,7 @@@ developers are still busy finding solut
  problems, but the release is supposed to be feature-complete, the
  documentation to be accurate, and no important issues to be
  overlooked.  For upgrading the syntax of your input files to the
 -latest version, see @rprogram{Updating files with convert-ly}.
 +latest version, see @uref{http://lilypond.org/doc/v2.17/Documentation/usage/updating-files-with-convert_002dly, Updating files with convert-ly}.
  Please test this release and report back any problems, see
  @rweb{Bug reports}.