Changed "text" and "textgen" tokenizers to ICUTokenizer for multilingual tokenization support, and added jar dependencies to installation steps.  Fixes #122
Merge pull request #276 from gwu-libraries/t122-multilingual-tokenization

Changed text and textgen tokenizers to ICUTokenizer for multilingual...
The Japanese example works well but there are issues with Chinese case. Multilingual-tokenization will need further enhancements.