More fixes for &--; sequences.
lang=es: use phoneme [O] for letter 'o' except at end of word.
leng=es: attempt to improve single 'r' between two vowels.


git-svn-id: https://espeak.svn.sourceforge.net/svnroot/espeak/trunk@139 d46cf337-b52f-0410-862d-fd96e6ae7743