Fix problem in *_rules files.  Conditional rules could cause corrupt phoneme strings.
Voice files, "replace" command using an "unstressed" phoneme now ensures the syllable is unstressed.
lang: us, pronunciation changes, use new phonemeeeeeeeee [@/] (at end of words) and [O].
lang: fr, pronunciation changes.


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@197 d46cf337-b52f-0410-862d-fd96e6ae7743