Add draft github pull-request template (#53)

Add a pull-request template for use on github when adding pull-requests to the common repo
---------
Co-authored-by: Joel Oskarsson <joel.oskarsson@outlook.com>
Co-authored-by: sadamov <45732287+sadamov@users.noreply.github.com>

.github/pull_request_template.md

@@ -0,0 +1,52 @@
+## Describe your changes
+
+< Summary of the changes.>
+
+< Please also include relevant motivation and context. >
+
+< List any dependencies that are required for this change. >
+
+## Issue Link
+
+< Link to the relevant issue or task. > (e.g. `closes #00` or `solves #00`)
+
+## Type of change
+
+- [ ] 🐛 Bug fix (non-breaking change that fixes an issue)
+- [ ] ✨ New feature (non-breaking change that adds functionality)
+- [ ] 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
+- [ ] 📖 Documentation (Addition or improvements to documentation)
+
+## Checklist before requesting a review
+
+- [ ] My branch is up-to-date with the target branch - if not update your fork with the changes from the target branch (use `pull` with `--rebase` option if possible).
+- [ ] I have performed a self-review of my code
+- [ ] For any new/modified functions/classes I have added docstrings that clearly describe its purpose, expected inputs and returned values
+- [ ] I have placed in-line comments to clarify the intent of any hard-to-understand passages of my code
+- [ ] I have updated the [README](README.MD) to cover introduced code changes
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] I have given the PR a name that clearly describes the change, written in imperative form ([context](https://www.gitkraken.com/learn/git/best-practices/git-commit-message#using-imperative-verb-form)).
+- [ ] I have requested a reviewer and an assignee (assignee is responsible for merging)
+
+## Checklist for reviewers
+
+Each PR comes with its own improvements and flaws. The reviewer should check the following:
+- [ ] the code is readable
+- [ ] the code is well tested
+- [ ] the code is documented (including return types and parameters)
+- [ ] the code is easy to maintain
+
+## Author checklist after completed review
+
+- [ ] I have added a line to the CHANGELOG describing this change, in a section
+  reflecting type of change (add section where missing):
+  - *added*: when you have added new functionality
+  - *changed*: when default behaviour of the code has been changed
+  - *fixes*: when your contribution fixes a bug
+
+## Checklist for assignee
+
+- [ ] PR is up to date with the base branch
+- [ ] the tests pass
+- [ ] author has added an entry to the changelog (and designated the change as *added*, *changed* or *fixed*)
+- Once the PR is ready to be merged, squash commits and merge the PR.

CHANGELOG.md

@@ -28,6 +28,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   [\#6](https://github.com/joeloskarsson/neural-lam/pull/6), [\#8](https://github.com/joeloskarsson/neural-lam/pull/8)
   @sadamov, @joeloskarsson
 
+- added github pull-request template to ease contribution and review process
+  [\#53](https://github.com/mllam/neural-lam/pull/53), @leifdenby
+
 ### Changed
 
   Optional multi-core/GPU support for statistics calculation in `create_parameter_weights.py`