GitLab

Summary:
**Added a Issue template**

Issue : https://github.com/facebookresearch/d2go/issues/8

Pull Request resolved: https://github.com/facebookresearch/d2go/pull/15

Reviewed By: newstzpz

Differential Revision: D26933233

Pulled By: zhanghang1989

fbshipit-source-id: af4af309fae3432021f15a6aecbbfb62e0c58be2