* add contrib/sort.py and .github/pull_request_temp…
* Add usage to sort.py
* Install sort.py if contrib-install is set
* sort.py: 0644 -> 0755
* Update sort.py
* Update pull_request_template.md
* Remove checkboxes from PR-Template
* Update sort.py
* Add examples to sort.py
* Update pull_request_template.md
Fix path to sort.py, it depend on the distro.
* Update pull_request_template.md
* Update pull_request_template.md
add hint about template