Add Github issue template to curb misuse.
Add Github issue template to curb misuse.

For information on Github issue templates, see:
https://github.com/blog/2111-issue-and-pull-request-templates

The template has been revised according to discussion with @shelhamer
and @willyd on pull request BVLC/caffe#4914.

gnina/gnina,gnina/gnina,gnina/gnina,gnina/gnina,CZCV/s-dilation-caffe,gnina/gnina,CZCV/s-dilation-caffe,CZCV/s-dilation-caffe,CZCV/s-dilation-caffe,gnina/gnina