Use internal data for iswalpha(), towlower() for characters up to U+024F.
Language changes: es, nl, pt, tr, vi.


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@346 d46cf337-b52f-0410-862d-fd96e6ae7743

Command line option --voices:
  Replace spaces in voice name by underscores.
  Show hyphen if no gender is specified.
  --voices=<directory> shows the voices in the specified subdirectory.

Language changes: bn (Bengali), an.


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@331 d46cf337-b52f-0410-862d-fd96e6ae7743

git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@321 d46cf337-b52f-0410-862d-fd96e6ae7743