Fix #1507: Inconsistent \festival output in regression testing.

Fix #1507: Inconsistent \festival output in regression testing.

* input/regression/song-skip-noword.ly

  reset *skip-word* to default at end of file to prevent override leaking
  into other regression tests

* ly/festival.ly (festivalsyl):

  use paramaterize to set *syllabify* and limit its scope locally to the
  music function's body

* scm/song.scm:

  make global configuration variables srfi-39 paramaters

[Keith, 2011-07-16 04:59:50]

http://codereview.appspot.com/4693046/diff/1/scm/song.scm
File scm/song.scm (right):

http://codereview.appspot.com/4693046/diff/1/scm/song.scm#newcode222
scm/song.scm:222: #:unfinished (and (not (*syllabify*)) (find-child-named music
'HyphenEvent))
The regtest that caused the initial trouble
   song-basic-nonenglish.ly
fails, maybe here-ish

[Keith, 2011-07-16 05:42:36]

Works good for me.

http://codereview.appspot.com/4693046/diff/1/scm/song.scm
File scm/song.scm (right):

http://codereview.appspot.com/4693046/diff/1/scm/song.scm#newcode222
scm/song.scm:222: #:unfinished (and (not (*syllabify*)) (find-child-named music
'HyphenEvent))
On 2011/07/16 04:59:50, Keith wrote:
> The regtest that caused the initial trouble
>    song-basic-nonenglish.ly
> fails, maybe here-ish

Oops. Somehow I had failed to apply the patch to festivaly.ly, so *syllabify*
was being set the old way.

[Neil Puttock, 2011-07-21 17:44:58]

On 2011/07/16 05:42:36, Keith wrote:
> Works good for me.

Thanks, pushed: 14632519690052980d19fc75e4dbc759c480aac2

Cheers,
Neil