Add pull request template

.github/PULL_REQUEST_TEMPLATE/pull_request_template.md

@@ -0,0 +1,10 @@
+Hi @cjslep,
+
+Please thoroughly review this Pull Request!
+
+Here is the issue related to this PR: (Must repalce this with the issue number)
+
+I understand Pull Requests without having a corresponding issue will be
+automatically rejected.
+
+(Replace This Text: Include a description of the PR)