Added pull_request_template.md (#118)

Added pull_request_template.md

Author: mcbarton

.github/pull_request_template.md

@@ -0,0 +1,14 @@
+# Description
+
+Please include a summary of changes, motivation and context for this PR.
+
+Fixes # (issue)
+
+## Type of change
+
+Please tick all options which are relevant.
+
+- [ ] Bug fix
+- [ ] New feature
+- [ ] Added/removed dependencies
+- [ ] Required documentation updates