add license

Author: kmaehashi

LICENSE

@@ -0,0 +1,19 @@
+Copyright (c) 2020 Preferred Networks, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

@@ -38,3 +38,7 @@ Before making a contribution, please confirm that:
 - Code quality stays consistent across the script, module or package.
 - Code is covered by unit tests.
 - API is maintainable.
+
+## License
+
+MIT License

setup.py

@@ -9,9 +9,11 @@
 
 setuptools.setup(
     name='pytorch-pfn-extras',
+    version=__version__,        # NOQA
     description='Supplementary components to accelerate research and '
                 'development in PyTorch.',
-    version=__version__,        # NOQA
+    author='Preferred Networks, Inc.',
+    license='MIT License',
     install_requires=['numpy', 'torch'],
     extras_require={'test': ['pytest']},
     packages=[