added crf++, license

Dockerfile

@@ -13,7 +13,8 @@ RUN apt-get update && apt-get install -y  \
     expat
 
 WORKDIR /home/deps
-RUN wget https://minio.clarin-pl.eu/public/share/CRF++-0.58.tar.gz && tar -xzf CRF++-0.58.tar.gz
+COPY ./CRF++-0.58.tar.gz .
+RUN tar -xzf CRF++-0.58.tar.gz
 RUN cd CRF++-0.58/python && python setup.py build && python setup.py install && cd /home/deps
 RUN git clone https://github.com/juzefwt/mead-pl.git mead && mv mead /usr/local/share
 RUN cpan App::cpanminus

README.md

+## Acknowledgements
+
+### CRF++
+CRF++ is copyrighted free software by Taku Kudo <taku@chasen.org>,
+and is released under any of the LGPL or the
+BSD License.  
+https://taku910.github.io/crfpp/