Update README.md

Update README.md

Removed CuPy in CI

Check CUDA installation

Set LD_LIBRARY_PATH

Set CUDA path

Removed conflicting CUDA install and wrap in conda run

Try a different cupy version

Resolve CuPy on the CI machine

Chainer runtime info print

Upgraded chainer to 7.8

Updated GCC in CI config

Create LICENSE

Check CUDA version

Updated CUDA toolkit version