Add pull request template

ewoutkramer · brianpos · commit 156545691c21 · 2019-03-08T15:26:00.000+11:00
diff --git a/pull_request_template.md b/pull_request_template.md
@@ -0,0 +1,5 @@
+Please make sure you always reference the issue number this PR is related to.
+
+If not related to an existing issue, include a description of the bug or feature this PRs is about.
+
+Make sure you include unit tests for the code you are requesting us to pull.
