Merge pull request #100 from github/hamelsmu-patch-3

Fix integration test errors adding sentence piece to dependencies

Author: Hamel Husain

docker/docker-cpu.Dockerfile

@@ -10,6 +10,7 @@ RUN pip --no-cache-dir install --upgrade \
     typed_ast \
     more_itertools \
     scipy \
+    sentencepiece \
     toolz \
     tqdm \
     pandas \
@@ -23,4 +24,4 @@ RUN pip --no-cache-dir install --upgrade \
 COPY src/docs/THIRD_PARTY_NOTICE.md .
 COPY . /
 WORKDIR /src
-CMD bash
+CMD bash