Create PULL_REQUEST_TEMPLATE.md

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,9 @@
+Fixes # _Please mention here if this PR addresses an existing issue_
+
+Summary:
+* List the high-level description of each change here, in order of significance
+
+Checklist:
+- [ ] Don't make changes to the repo that aren't necessary for the changes described above (e.g. style/formatting changes)
+- [ ] Make an update to [CHANGELOG.md](CHANGELOG.md) with a quick overview of your change under the version whose branch you're merging into. This should also include a reference to your username/profile and any issues you're addressing, with this PR # (_once submitted obviously, chicken/egg and all that_)
+- [ ] I use continuous integration with Circle and/or Travis CI, and any of those builds run must be passing. Ask for help if you need guidance figuring out why they're failing