Include core in Python distribution
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..5b4ab04
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1,8 @@
+graft src/python/grpcio/grpc
+graft src/python/grpcio/tests
+graft src/core
+graft include/grpc
+include src/python/grpcio/commands.py
+include src/python/grpcio/grpc_core_dependencies.py
+include src/python/grpcio/README.rst
+include requirements.txt