PULL_REQUEST_TEMPLATE

Fix # .


Changes proposed in this pull request:
- 
-

@ mention


Make sure those checkboxes are checked if you want to be reviewed

- [ ] Your branch should be mergeable on current master
- [ ] Tests should pass
- [ ] Linter should pass
- [ ] Code coverage should stay higher than 90%
- [ ] Squash your commits to one commit and follow those recommendations about [writing good commit message](https://github.com/angular/angular.js/blob/master/CONTRIBUTING.md#-git-commit-guidelines)