The alphabet type is now communicated from the frontend to the backend using a

The alphabet type is now communicated from the frontend to the backend using a
one-word internal name instead of an array offset.

The Ruby host language types were just copied from Java. Reduced them to two
basic types: char and int, both signed.

git-svn-id: http://svn.complang.org/ragel/trunk@213 052ea7fc-9027-0410-9066-f65837a77df0