The conversion from the string language type which comes in from the XML file

The conversion from the string language type which comes in from the XML file
to the hostLangType and hostLang variables is now handled by the redfsm.a
library. The code generators can use hostLang variable to check that the host
language is correct.

Adapted the line directive writing for Java and Ruby. In these languages a
comment which indicates the line number is written.

git-svn-id: http://svn.complang.org/ragel/trunk@77 052ea7fc-9027-0410-9066-f65837a77df0