release: 1.5.7

release: 1.5.7

=========

* Use Cygwin included Python; drop Windows Python and workarounds.

* Include make/lilypond.mandrake.spec (unchecked!) and README.mandrake.

* Comment out two non existing examples in regression test, add one
missing from 1.5.5 distribution.

* Revert silly grace-with-braces stuff in tutorial.

* Add short crescendo bug to input/bugs.

* Update and bit more verbose download instructions in INSTALL,
  fix some links on ftp.lilypond.org.

1.5.6.h