Add pull request template

ndmitchell · web-flow · commit 30d2de5a8c1a · 2018-09-03T00:25:17.000+01:00
diff --git a/PULL_REQUEST_TEMPLATE.md b/PULL_REQUEST_TEMPLATE.md
@@ -0,0 +1,5 @@
+Thanks for the pull request!
+
+By raising this pull request you confirm you are licensing your contributions under the project license (see LICENSE) and that you have no patents covering your contribution.
+
+If you care, my PR preferences are at https://github.com/ndmitchell/neil#contributions, but they're all guidelines, and I'm not too fussy - you don't have to read them.
