Add requirements

requirements.txt

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+absl-py==0.2.2
+astor==0.6.2
+backports.weakref==1.0.post1
+bleach==1.5.0
+decorator==4.3.0
+enum34==1.1.6
+funcsigs==1.0.2
+futures==3.2.0
+gast==0.2.0
+grpcio==1.12.1
+html5lib==0.9999999
+Markdown==2.6.11
+mock==2.0.0
+networkx==2.0
+numpy==1.14.5
+pbr==4.0.4
+protobuf==3.6.0
+scikit-learn==0.19.1
+scipy==1.1.0
+six==1.11.0
+sklearn==0.0
+tensorboard==1.8.0
+tensorflow==1.8.0
+termcolor==1.1.0
+Werkzeug==0.14.1