Made it work for 1.9.3 as far as i can see, probably incompatible with < 1.9

Following is changed:

- jcode is not in ruby 1.9 anymore. So removed all dependencies there.
- jlength replaced with size.
- added '# encoding: UTF-8', apparently that is the new $KCODE. I did not find any other way of doing it for all files.
- added Dir.pwd to ruby load paths. For some reason it is not picking up the "!path's" from fitnesse. I don't know  when this is set? This should be fixed maybe you can help? See line 80 in statement_executor.rb