Applied java data array encoding patch from Colin Fleming. Only works with byte

Applied java data array encoding patch from Colin Fleming. Only works with byte
and short alphabet types. The transformation to java in the test suite sets the
byte alphabet type (default is char, which is unimplemented).

git-svn-id: http://svn.complang.org/ragel/trunk@54 052ea7fc-9027-0410-9066-f65837a77df0