message: Added note about rebasing after review process in CONTRIBUTING.md
diff: @@ -23,7 +23,10 @@ When logging a bug, please be sure to include the following:
  ## Pull Requests
  -For build instructions/suggestions see [BUILDING.md](./BUILDING.md).
  +- For build instructions/suggestions see [BUILDING.md](./BUILDING.md).
  +- After the review process is started please **don't** use rebase to update a branch, use merge instead.
  +
  + It's a hard to track the changes you made in previous commits when rebasing (and even determine whether you changed something indeed).
  ### Tests
  