GitLab

* add GN support for flops computation

* remove useless lines

* modify the flops computation for gn

* collect env info for trouble shoting

* minor fix

* update the issue template

* fix the travis building

* update setup classifiers

* update to v1.0rc1

* update maintainers

* Added pre-commit hook

* Trigger CI

* add isort config

* use isort to sort imports

* add isort to travis