Created by: gangliao
I already integrated a lightweight variant into our project, so we can exclude boost now.
It's better to maintain a new repository https://github.com/gangliao/Tensor , because we don't want PaddlePaddle Review Process and Messaging to block our progress. We want more focused on refactoring.
In Tensor repository, I added variant, runnable CMake and unit test framework to accelerate our development progress.