foundationdb/pull_request_template.md

# Code-Reviewer Section
The general guidlines can be found [here](https://github.com/apple/foundationdb/wiki/FoundationDB-Commit-Process).

Please check each of the following things and check *all* boxed before accepting a PR.

[ ] The PR has a description.
[ ] The description mentions which forms of testing were done and the testing seems reasonable.
[ ] Every function/class/actor that was touched is reasonably well documented.