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

Added language: ga (Irish).
Languages changes: en-us, eo, hu, pt, ta, vi


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@310 d46cf337-b52f-0410-862d-fd96e6ae7743