Create PULL_REQUEST_TEMPLATE.md

Author: dcwhite

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,8 @@
+TODO
+
+In the new file, add your pull request template. This could include:
+
+    A reference to a related issue in your repository.
+    A description of the changes proposed in the pull request.
+    @mentions of the person or team responsible for reviewing proposed changes.
+